Wonderful!!! Confession though: So far we haven't used for an entire night - we were supposed to go camping last week, but then the baby got sick. So sad. BUT I will update when we can with them next. That being said - I still have a lot of initial impressions.We ordered 2 mats and I opened them right away for two reasons: 1) To see if they would actually inflate and make sure that weren't defective (they worked, no defects) and 2) Directions day to let them inflate over night the first time and that, thereafter, they should inflate quickly.After they inflated, I laid on them for over a 2 hours (watching t.v.).Initial impression? COMFORTABLE! I must admit that I had been dubious - these are only about 3 inches and I've used 3 inch blue foam mats before and those weren't more comfortable than an air mattress. But they fold huge. Air mattresses are somewhat comfortable for the first hour - but then as you lose air throughout the night (especially if there is a big temperature change) - my hips always wind up on the ground or at least significantly lower than my shoulders as my bottom weight displaces the air at lot more than my top half. So I looked at this little 3 inch thick thing and wondered if it would just be a mix of the things I didn't like in the other sleeping options. After trying it - nope! Since there is less air and more foam than an air mattress - my hips can not sink significantly lower than my top half. I even opened the valves up for a bit too let lots more air out (to pretend there was a hole or a big temperature change that causes the air to condense) - and my hips just rested nicely on the foam that is a softer foam than the thick blue may ones - very tolerable (at least for the 30 minutes that I tried this) unlike if your air mattress develops a hole in the middle of no where.I am a side sleeper and my hips never hurt on these. I actually let air out of mine to make it less firm! Being firm wasn't uncomfortable, just more comfortable for me with some air out.These fold big. I added pictures, one with a water bottle to show size comparison. The mat that is folded a little smaller I rolled twice - I rolled out with the valves open, closed the valves, opened it and began re-rolling it - using my knees and body weight to push air forward, them when it was 3/4th rolled, I opened the valves again ago that I could finish rolling and push out more air.Even though the following benefit had nothing to do with its function, I LOVE it. All tents and sleeping bags that come in bags that you will almost NEVER get the item back into. These mats come in a bag that has plenty of room to spare - so my big re-roll fit into easily! It also came with velcro straps to wrap around the roll (see pictures). I love that the company was basically "honest" by providing the big bags because they know we can never roll it as small as the factory.Although these fold big, that is not a set back for me, as we don't backpack and rarely camp in places where we can't be parked within at least a quarter mile of our campsite. If you're a backpacker, stay away from these - if you wish you could be a glamper but don't have the funds for a camper-mobile or pop-up tent, these mats are the next best thing. No more tough foam mats or bouncy, leaky air mats for me!