I think Tuan's large format site did a detailed test of the camera. I used a Canham 5x7 wood camera for a couple of years before deciding that I'd be happier with a more precise, rigid monorail camera.
That said, Keith is great to talk to and seems to be an honest, straightforward guy. I'd recommend you give him a call.
Another dealer I can recommend is Ray Ng at Photo Habitat in NYC. He's been a Canham dealer since the beginning and is a very reputable guy himself.