I’ve only managed a few nights in the Recon Bivy but it has become a game changer for my tarp setup’s.
Ventilation. I haven’t had any condensation in the bivy, (welcome change from less well ventilated bivy sacks).
1. Interior liveability. Yes, it's a small bivy, but there's plenty of room for me, my sleeping pad, clothing and any other equipment you want to keep from the elements. It can be tucked in the foot or along the sides of your pad in the bivy. Mind you, I use a thicker pad and pillow, so I only have about an inch or two of headroom when the bivy was zipped up. You'd have more if you used a thinner pad and pillow.
2. Packed size and weight! The Recon packs to the size of an orange, and the reg/reg weighs 7oz with the stuff sack.
3. Easy to get in and out! More bivvies’ need a long central zipper. It's easy to get in and out and load my pad and Revelation APEX quilt in through the opening. The zipper doesn't snag the way a bivy with a U-shaped zipper can and opens and closes with ease.
4. The solid panels help keep the wind out. There were some cool breezes where I was using it, and I barely noticed them when I was in the Recon. It's obviously not going to be as warm as a dedicated winter bivy, but they are prone to condensation.
1. The floor is slippery. This is a given with silnylon. If you're using it on an incline or decline, your pad will slide. I was on a bit of an incline, and I had to reposition my pad a few times throughout the night. You'll want to select your site carefully and ensure its flat enough.
2. If you can call this a con, the floor is very thin, and you'll want a groundsheet. I've gotten a lot of flak for this, but I always use one.
I really, really like this bivy. It's an excellent addition to my setup. This is what I would consider to be the perfect ultralight bivy. If you like solo tarp camping, and this may very well be the bivy for you. It'd also be great as a standalone shelter on a clear night and gives you a great view of the stars and wildlife.