Yes, it has run problem-free under windows 11

Yes so far without problem

Yes, but be careful, this motherboard has a problem with the network interface, which doesn't work in v1. So be sure to check the CM version before buying. A new problem has arisen recently: the PCIe bus mode changes without warning, so there's a problem negotiating transfer speed with the GPU. This resulted in a black screen. Had to do a CMOS reset to get it working again.

Yes it is

yes