Mine works great, flashed through M-Flash option inside MSI efi bios and it went flawlessly. Win 7 activated with no issues upon installing msi certificate and key. I am installing Win 10 right now and will post here if it stays activated. Partition is cloned just in case if it goes bad in some way, so I still have working Win 7 system (twin) partition.
Windows 10 Pro stayed activated after upgrade. It says it is activated by "digital license". So these SLICs are good for WIn 10! Thanks to everyone making these mods!