I love the camera. As said earlier, the lenses are very special. I can get resolutions that I thought could only come from medium format. There are some quirks in the Version 1, like the shutter speed showing on the back of the camera in A mode, so try and get version 2 if you can. The biggest challenge comes in dealing with the film afterwards. I use mainly Fuji Velvia 50, so it needs to be scanned, and unless you have a higher end scanner like a Nikon 9000 like i have, it will be some sort of special process to scan. Add to that if you get your film done outside, you'll sometimes have them cut through frames thinking it is normal 35mm format.
As an aside, the only sub-par thing about the XPan is the quality of the paint. It will look battle scarred very quickly, which belies is actual amazingly strong build quality.
Enjoy it - and leave your friends gasping when they see the results.
David