No first hand experience, but I hear that the experience being pretty good. Quality is solid and the cases are stocked, not made to order. You should probably ask on smallformfactor.net/forum . The guy who runs it is on there as well.

I don’t have any personal experience, but afaik, they’re the only options for putting mATX and ATX into an SFF case. I watched a review that said the case was nice and worked like most breathable ITX cases, though the CPU cooler options are limited due to pretty low clearance.