This is my first dual-density dildo, I picked this one in part because it's more affordable than others I've seen, and also because it's non-realistic. The purple color is so cute in person!

While I was surprised that I couldn't feel much of a difference with the dual-density versus regular silicone when it was inserted (maybe that's just me), I think the softness of the head protects from the smacked-in-the-cervix feeling I get with some toys of this length. That cushioning is my main pro for the Cush O2.

One feature that I'm not into, but others may like, is the ridge partway down the shaft. It's mild enough that it didn't make much of an impact in stimulation but makes a fairly large dildo even more to handle— I didn't really see the point of it.

Biggest drawback: I think it's actually a little wider than the 5.5" circumference listed. I own the Avant D6 from Blush Novelties, which is supposed to be the same width, but IMO this one is noticeably larger. Out of curiosity I measured the Cush O2 and found that the circumference is closer to 5.75" at its largest point, and now I'm wondering if the Avant D6 is actually a bit smaller than advertised as well. This might not be a con for some, but it's somewhat of a stretch for me. I originally thought that this might replace the D6 as my go-to for strap on play because of the dual-density silicone, but because of the size, I think it'll be more of a special occasion dildo.

One more note: if you're buying this for strap-on use, it's too big for a typical underwear-style harness (RodeoH/Packer Gear/etc).