The Demon double dildo is great for double-penetration fantasies whether one vaginally and one anally, or for the more experienced or adventurous even double vaginal or double anal. I (male) personally used it for double anal. You don't need to be too experienced for standard double penetration (one vaginally and one anally), as long as you have done some anal before, as each dildo is a pretty regular size. For double vaginal or double anal, the combined girth is pretty large (~7.5" circumference) but the dildos are soft and squishy so it shouldn't be too difficult if you have experience with large dildos.

The Demon has a relatively strong suction-cup for hands free play and I didn't have any issues with the suction being too weak on smooth, flat surfaces.

The Demon is made of premium silicone that is pretty soft and squishy with no smell. There are the ridges below the heads on the dildos and some veiny texture running along the shaft, but since the silicone it is made from is soft and squishy I did not personally feel the texture much. With the squishiness and subtle textures I would say relatively beginner users would be perfectly fine with this toy.

Overall I like the design of the Demon, especially for anyone looking to adventure into a double-penetration fantasy with semi-realistic dildos. For standard double-penetration, the size of each dildo is relatively average so most people should not have much of a problem with using it. The silicone is also soft and squishy which makes the dildo even more forgiving for its size. For slightly more advanced or experienced users, the combined girth (~7.5" circumference shown in picture below) and squishiness of the dildos makes the Demon a bit of a challenge but by no means unsurmountable. If you've been able to take large, firm dildos you should have no problem taking the Demon as double vaginal or double anal. For example the Titan has a similar circumference but is much firmer, so if you are able to take the Titan you should have no problem taking the Demon in the same manner. Even a bit smaller should be sufficient training for the Demon.

The Demon is best for beginning to explore double-penetration with the reasonably sized shafts and squishy silicone. The suction cup works well for its purposes for hands free play, and should also be harness compatible. The main drawback of the Demon is the thinner section of the shaft at the base of the 'anal' shaft makes the shaft a little too flexible, making it a bit difficult to insert the shaft without it just flexing out of the way.

Made of non-porous silicone, the Demon is relatively easy to clean just with warm/hot water and soap. You can also boil or use 5% bleach solution if wanting to sanitize the dildo more.

As its a silicone dildo, best to only use water-based lube. I personally prefer the gel/jelly kind of water-based lube.

The Demon is a bit of a larger toy, but since its a double dildo it sits wide but flat pretty easily. I store it in a drawer with most of my other dildos/sex toys, but try to avoid it touching any of the other toys out of an abundance of caution. If you have any other kind of rubber/plastic toys you should not have the Demon stored right next to them.