I bought this as a good low-price entry into Bivy camping. Aqua-Quest makes primarily dry sacks. So in essence it's a dry sack in the shape of a bivy.
1) It's roomy. My 0 degree bag AND inflatable pad fit inside without issue.
2) It's lightweight. At a little over a pound and a half it was a great alternative to a tent for ultralight backpacking.
3) I started packing it without the stuff-sack in my pack and putting everything inside it. Voila! No pack cover and all my gear stays dry, an excellent double purpose.
4) Setup after a long hike is lightning quick, but this is a trait of all pole-less bivys. Roll out the bivy, throw the bag inside while holding the two hoods together and shake out, then insert the pad inside between the bivy and bag back. Done! Crawl in and crash.
1) It's not breathable. If you create condensation inside it, it stays inside it. I'd only use with a synthetic bag, a down bag might get soaked.
2) No bug mesh. Mine was obviously a 1st gen version. The current specs on Aqua-Quest's website detail a bug mesh on the face portal. I'll either have to sew some in or just sleep with a bug hood on like I have been.
3) (This is really minor) Stuff-sack is twice the size it needs to be. Fully compressed the bivy takes up about a third of the sack. Not a deal killer, just an observation.
I can't speak to long term durability as I've not had it out but a few times, but so far it's pretty nice. I've been using a ground cloth but I'm almost to the point where I might forego even that, although dirt is a problem.
Summary: Not best in class, but a solid first attempt. I'd recommend it to someone looking to bet into outdoor bivy camping on a budget.