>>4391239i've had an sq-b since summer and i think it's awesome. no problems so far besides damaging the wl finder spring/latch mechanism by handling it recklessly. i found the 80mm lens to be a bit tight as a 35mm equiv main, so i got the 50mm/3.5 which feels much closer to a 35.
it's a far slower and clumsier operation than any dslr though, so just be ready for a very differnet shooting experience.