I think the pad that most people will compare this to, like myself, is the Big Agnes Insulated Air Core. That said, I just picked up the NeoAir, and have the other pad as well. Thoughts first, then pics.
14.5 ounces on the scale... WAIT - there's a bunch of paper in the middle after I unrolled it! In fact, .5 ounces worth. So, 14 ounces on the nuts. Woot!
Okay, it took 12 of my big breaths to blow it up. I blew up the Big Agnes 72x20 rectangular IAC and it took 12 breaths also. But, I noticed the valve on the NeoAir is easily 1/2 as restrictive to blow through, and thus much easier to blow up. It was so noticeable that I had to check the BA valve to make sure I unscrewed it all the way.
Laying on them is very similar. The NeoAir has a little less bounce, and the sideways tubes are more comfortable. It's not a dramatic difference, but it is more comfortable. Main test for me was side sleeping. For some reason I had to let less air out of the NeoAir to achieve comfort when side sleeping. Not sure why, but this is good because air = insulation. I also didn't roll form side to side as easy. Without a real sleep test, I'm thinking I'm going to like it better. Field test will tell the truth.
Okay, pics. The NeoAir packs down WAY smaller than a BA:
When inflated, thickness is the same, width is the same, but the NeoAir is about 1" longer. I don't get the complaints that it's narrow. It's the same width as any other 20" pad, which is the standard. Here's inflated comparison shots: