Pocketables has posted a very interesting review about the Kohjinsha PA. After ready it I arrived to this conclusion: Beauty is a very complicate criteria. I find the Series PA exterior design attractive.
From a usability standpoint, the Kohjinsha PA series packs a lot of function into a portable package weighing just 14.1 ounces. The convertible form factor is versatile and encourages a wide range of usage scenarios, while Windows XP makes it a fairly robust system to carry around in a pocket. Unfortunately, because of its high price, unique aesthetics, and limited RAM, I don't think the PA will be able to find success in the already niche market of UMPCs and MIDs.