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Ordered from Amazon.com US website.
I'd slept on straight tube inflatable ones, but found them uncomfortable... the air moves around too much and I'd wake with the sides being firm but me feeling the floor.
The Klymit was the first design I thought would fix that, it's weird chevron tubes means any air loss still results in an even distribution. It remains comfortable all night.
I chose the insulated one simply because I was buying my wife one at the same time and she feels the cold quite badly. His 'n' Hers. I maybe would've gone for the second one I linked above if I were not trying to just buy identical stuff to avoid the "How come you get the better one?" type debates. That said, I love the one I did buy, it's pretty light at 700gms but not ultralight.
I went for one of these: http://www.klymit.com/insulated-static-v.html
But there are some insane superlight ones available: http://www.klymit.com/inertia-x-frame.html which is only 258gms and yet full length inflatable.