I find it hard to imagine a more perfect dildo. It's very filling, feels great to squeeze around, and I can change positions with it inside me.

Mark is a pretty fantastic toy, overall. It's made of dual-density silicone, has a flared base for anal or harness play, and is not too big or too small--perfect for beginners and experienced toy users, alike! However, I'd recommend waiting for a sale to purchase this toy.

I would not recommend this toy for beginners due to its size, but otherwise it is a wonderful addition to any toy box. Mark is textured with veins, is realistic-looking with a penis head and is available in flesh tones. This dildo is harness compatible and easy to clean. Fun times are sure to ensue!

The Mark is larger than my usual dildo size, so that took me some time to warm up to. But I love the amount of control I have with it. I can count on this toy to deliver orgasms and have also enjoyed using it anally, and if you are looking for a toy of this size with a firm core then I highly suggest it.

This is a great dildo. The price is a little high, but still lower then other realistic dildos. It is just a shame that we have found another dildo who's sizing is off on its product page. I would have loved for this to be the 1 3/8 inch diameter that it is stated to be. At least the wife likes it and will get some use out of it.

If you are on the search for a luxury dildo that is very realistic, look no further than the O2 Mark. He can be used by beginners and for more advanced users. His flared base makes it safe to use anally and in harnesses. The premium silicone is one of the highest grade silicones on the market today. Mark has made me a believer of realistic dildos. I never knew how good they could feel.

An excellent quality, highly realistic dildo which is very well suited for both solo and couple play. I haven't had many chances to play with it yet, but I look forward to using it for a long time to come!

Mark is that perfect in-between dildo that isn't too much of any one thing. Whether it's size, curvature, realism or texture, Mark is average in all departments and is one of the most realistic feeling dildos I own. Its dual-density core would pass just any squeeze test, and the quality just speaks for itself. This dildo pleases both aesthetically and during use and shows that average looks can be very deceiving.

The moment I saw Mark, I knew I had to have him. His realistic styling and size reminded me of my very favorite real cock, and once I got my hands on Mark, I knew we'd be very happy together.

A great dual density, semi-realistic, medical grade silicone dildo. It's easy to care for, body safe, non-porous. The size is right in the middle. It won't please size queens but may be too large for some. It's very versatile, safe for vaginal and anal use whether in hand or in an o-ring harness.

If you're on the border about Mark, take my advice and give him a chance. He isn't the biggest or thickest, but if you know how to use him, he'll get the job done and do it well.

I would recommend it to a friend because it is Tantus and their products are top quality. This model is jut too hard for me and the curve but a strain on my canal.

This is overall an excellent toy, specifically designed to feel realistic and made by a company with a reputation for high quality. Despite the price tag, this is the toy I recommend to almost anyone, from beginners to experienced toy users.

If a realistic dildo of average size that feels really real is what you're after, you couldn't do much better than this one, for use in a harness or by itself. It's on the expensive side, yes, but you get what you pay for and this toy combines the realism of cheaper, less body-safe toys made of various "___-skin" materials with the safety of silicone very well.

I wasn't looking for a porn star when I selected the Tantus O2 Mark. What I got was the shy looking boy next door who is a tiger in the bedroom. I love Mark's feel, his size, his versatility, and being able to pretend that he's my very own cock. I have other silicone toys, and was skeptical that a silicone dildo could feel realistic, but Mark has made a believer out of me. He's my new best friend in the bedroom, and I can't wait to introduce him to my boyfriend!

Mark tried so hard. His silky skin, his squishy outer layer, his firmer inner core, all should have added up to a perfect experience. He looks fairly realistic, nice veins, not overdone. Real looking head. All with a great base for anal or harness use. He's a great toy, for those who enjoy a slightly smaller, thinner toy than an ungrateful Size Queen like me. He's a great guy. But, he didn't hit the spots for me. However, he does for many.

Note that my review is based only on anal experience, and I am not an expert on the functionality in vaginal use. Beside that point, this is my far the best toy I have ever used. It is an average-sized, dual-density silicone toy made by Tantus. It has a soft head, which makes direct g-spot or p-spot stimulation difficult. Mark is realistic with out being over the top, and mostly smooth with slight veining. Its harness compatible with a wide base.

If you're looking for an average-sized, realistic dildo, Mark is the one for you. Featuring a flared base for harness compatibility, this toy is safe, sexy, and highly versatile and can be used for anal, as well as vaginal insertions. As long as Mark holds up...I plan on never buying another realistic dildo. Ever. This one is sheer perfection.

Mark is a very beautiful medium sized realistic looking toy that also has a realistic feel. The dual density silicone gives a yielding feel, but he also retains his shape without wobbling. The texture also gives a rather substantial internal feeling, so he feels bigger than he looks. Although the shape is not novel Mark is an extremely satisfying dildo.

Tantus's O2 Mark may not be the quarterback of the team, but it certainly fits in my "tight end" like it was meant to be there. It's not huge, which is great for everyone but size queens, it's semi-realistic, feels amazing in use, and has only one very minor flaw. The Mark is an excellent, well-made toy, worthy of sharing your "field" and will keep you "running back" for more.

The Mark O2 is the most realistic looking dildo I own, and it totally is the most real feeling. It has an ingenious dual density shaft that really mimics a real, hard cock. I works well for vaginal penetration, but it did not provide g-spot stimulation. Anally, it also felt great, but due to the soft head, it can sometimes take a bit of patience too insert. The Mark O2 is one of my favorite dildos now!

This is an average-sized dildo that leaves a huge impression! It is the perfect size and shape for me; fills me up without hurting my cervix. Made of high-quality silicone with dual-densities, it feels just like the real thing. Easy to clean, which is good because no storage bag means it picks up quite a bit of lint.

This realistic silicone dildo by Tantus is not too big and not too small, but "just right" enough to please even a demanding Goldilocks. It features a softer silicone on the outside, with a firm inner core, and an effectively ridged head and pronounced veining. Great for gender play also!