The Kiwi 4 rocks. I posted some comparison pics in a few other threads and people here are probably sick of seeing them. If you want to see them I will send you links.
Frankly I like the VG-10 and peel ply G10, and I think the Kiwi 4 represents the most recent culmination of Sal's design experience, seamlessly blending a decent sized blade with an ultra-compact package and impeccable ergonomics and safety. I know the build might seem plain, but it seems to be a hard sell for a lot of people based on what I've seen, and premium materials would up the price and make it even harder to justify. If it sells well, as we all know, those doors are likely to be opened. But in reading reviews of the Air, for example, I gather that premium blade steel in a small "gent's" folder confuses people and makes them uneasy about the price point. I imagine the same would be true for the Kiwi 4.
Anyway, like Deric I am also happy to post comparison pics or send you links, so just let me know if you want photos or user feedback.