Dennis E.wrote a review of Integral Designs Nestor Bivy on September 15, 2012
For a bivy/solo tent, this thing is great. yes, it's small, but that's the point. I have packed this thing up to 11,400' feet in Colorado and spend 2-3 nights at a time. I have also had my 70lb lab with me a couple times and there is enough room for her at the head of the tent if I slide my pad and bag down to the bottom. It gets a little tight but it's worth having her along. I could see a condensation problem with this tent, or any tent of this design for that matter, because there is no covered vestibule or vents that you can leave open in bad weather. This isn't a problem for me because I always pack an EMO fly with anyways, even when I pack my 2 person tent, just to have a place to sit under and cook, etc., in bad weather. I set the Nester Bivy up under the back side of the fly and have the front half to store gear and keep the rain out of the bivy when the door is rolled up. I haven't had it long enough to test the durability but it seems to be made of quality material and is put together very well.