That's an odd looking bass for sure, but you know.... it was built because someone ordered it.
I have 2 Wishbasses. One is a very unusual 6 string bass that looks and plays like a cello. Acutally its modeled after a viola da gamba. It has a lovely sound and I've used it for recording several times. The other is a 4 string BG that I've played every weekend in an R+B band for the last 8 months since I got it. I'm planning to order a 3rd in a few weeks.
There is nothing usual about Wishbasses. He and his work is original. You should visit his website and read about why he does what he does. At first I thought his comments about not having a trussrod was strange, but since owning and playing two of his instruments I'll tell you, he's right. The necks are thick, but easy to play, and since I switched from my Rickenbacker to Wishbass, I don't have hand cramps and the morning after a 4 hour gig, my left arm is free of pain.
I'll give you that the 'fit and finish' is less than the production line models you see in stores. So, you'll spend a little time with some steel wool and doing the finish yourself (highly recommended) and perhaps some other little things here and there, but you'll have a unique looking and great sounding bass.