I have an Xpan II with 45mm, I dont really care who makes it, dont really care about any stats or curves. I just love this camera, I love the 24mm x 65mm format. My main camera is a hasselblad 500cm and use their 40mm/80mm/150mm lenses. I really love the 6x6 square but I take the Xpan everywhere, everyday.
I'm not saying its the best camera there is and I'm not saying everyone would like it but its worth looking at.
There are several reviews online;