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.

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.