Mine arrived yesterday. I think the durability seems fine, doesn't look like it is going to get punctured unless you do it with something quite sharp.
Kudos to Thermarest for giving accurate, if not conservative estimates on the weight! My regular weighs 13.75oz (390g). It's nice to get something that actually weighs *less* than the specs state.
I've slept on all sorts of pads over the years (except a DAM), and this is by far the comfiest. I was quite surprised at home comfy it was... I wasn't expecting it to be much different to my POE ether thermo. But it is. It's the horizontal baffles that do it. Every part of you sinks into the mattress and it is actually quite "bed-like".
The only minor concern is that for maximum comfort when sleeping on your side, you probably need it to be inflated a little more than you would have it when sleeping on your back. If your side presses through to the ground (or near it) there is literally zero insulation and I can imagine it getting a bit cold. So if you like to switch between side and back, you need to have it inflated sufficiently for a side sleeper.
The other thing is, if you do get a leak, or don't inflate it properly you'll end up literally lying on the ground. It's quite surprising how something so comfy transitions to something so hard when you put all your weight in one spot!
Anyway, big thumbs up from me so far. Highly recommended for both weight and comfort.