This dildo felt amazing to be fucked with, but one of the most exciting things about it for my partner and I was how fantastic it is for blowjobs. The soft head fits in my throat better than any other cock I've sucked (silicone or flesh), and the texture feels much better on the lips and tongue than harder silicone. It's a nice thickness, definitely not too thin, but it's not so fat that it's at all a struggle to wrap your mouth around. The friction between the surface of this cock and your mouth is comparable to real cock, which also means putting your hands on it, jerking it off, is way more possible--with traditional silicone cocks, either your hand just doesn't move, or you add lube and it's too slippery and slides off.

Insanely pussy-friendly. Tantus's O2 silicone lives up to the hype. The plush, squishy outer layer moves a bit over the hard inner layer, which makes it feel more like a flesh & blood cock, though it's much more flexible than one. It can bend almost entirely in half. The head is pretty much entirely the softer (white) silicone, so although it's a bit thicker than the rest of the dildo, it's not an inconvenient shock the it can be when the head's dimensions don't match the ones listed online. The ridge of the head and the three ridges on the top of the cock are also entirely in the soft silicone, so they're not abrupt or uncomfortable, though they definitely add to the sensation.

The only drawback to the texture is that it attracts lint, dust, and hair like a magnet. I've been keeping a damp cloth near the bed while fucking to wipe it down with as necessary, and of course adding a condom when it's just rinsed and not too linty helps. I've been storing it in a wetbag intended for menstrual pads, purchased from Etsy. It's lined with waterproof material, so there's no lint.

In terms of girth and shape, this cock is ideal, and most pussies will probably like it. I'm also excited to try it in my ass at some point; as I keep saying, it's not a super thick cock, and I imagine it'll do the trick nicely. It may be a bit long for some folks, at 7 1/2 inches of insertable length, so if it's important that you be able to sink this into someone all the way, keep that in mind. There's enough of a head to make blowjobs aesthetically hot, though it's not a particularly realistic cock given the colors and most of the shape. I'm also a big fan of the dual density silicone's appearance on this one (definitely prefer it to the Raquel), with the dark color of the hard inner core, and the pearly white of the squishy silicone on the outside gradually becoming more opaque until the head, which is all white.

The only drawback of the design (for me at least, particularly since I don't really like vibration and therefore it's not a plus that it can accommodate a vibe) is that the hole for the vibe makes it less-than-ideal for strapping on and fucking with.

The first time we used this cock, we ran into a few issues. First, if you want to strap with the Niagara, your harness should have an O-ring system. The base isn't very big (circumference-wise), and it's not very thick, either, so it'd likely slip out of a harness without adjustable O-rings. The O-ring we had around that would hold the base in place was a bit of struggle to get over the head, so we had to get the O-ring on first, then snap it into place because the straps around the O-ring wouldn't allow the head through. This isn't a huge problem, it just took a few extra seconds to get it strapped, and I should be able to find an O-ring that is a tiny bit bigger but still small enough to hold the base in place for future use. Second, we realized that without anything in the hole that accommodates a bullet vibe, the base is a bit collapsible and bendy, and it would be more thrust-able if it were solid. The bullet can't be used while strapped on to remedy that problem (or just for fun), because it protrudes from the bottom of the dildo. For me, it's not at all important that it vibrate, so I kind of wish it were just solid (and yes, I know the O2 Revolution is solid at the base, but it was too girthy to meet all my requirements). The other issue with this bullet-vibe-accommodating hole is that it can make it uncomfortable to have against your body, if you're using a harness without a back pad (mine's the Commando, by Aslan Leather). The edges of the hole are hard and a bit sharp.

Despite that, I still say this cock performed well, and is probably comfortable to strap on with a back pad. I'm looking into finding something to use with my harness that isn't bulky and ugly like Aslan's Driver Pad. It definitely feels fantastic to be fucked with, and on that count is highly recommended.

Wash with soap and water between uses, and boil or bleach or put in the top rack of dishwasher with no soap to sterilize. As mentioned earlier, this thing attracts dust and hair and lint hardcore, and if it touches anything but skin it'll be covered in a layer of lint. This is workable if you just put a condom on it fast, if you're careful only to put it down on someone's body in bed, and/or if you keep a damp cloth nearby for a quick wipedown as necessary. You could potentially store it in the plastic box it came in, but it's a bit flimsy and doesn't really look like a permanent storage solution. As with all silicone dildos, use a good water-based lube with this one.

The O2 Niagara comes in plastic packaging that in a store would hang from the tab on the top, enclosed in a molded layer that folds in half to hold the dildo and bullet in place so they're visible in the clear plastic box. There aren't really user instructions included for this particular dildo, just info about Tantus. You could store the dildo in the outer box, but the plastic is pretty flimsy and doesn't really seem like a long-term storage solution (compare to the canister included with Vixen dildos, for example).