I've installed the alpha 4 but still need to test. Now I have a problem with the alpha 3. I had Debian running last night when it suddenly rebooted again. Or it tried too. The fan spun up and then lowered. I shut it off the the night. I thought it may be related to GPU errors but those have cleared up in dmesg. Must have been a recent update a couple of weeks ago that fixed that. But Debian has some problem of suddenly rebooting. I haven't seen any other distros do it.
Edit:
Booted Debian and it loaded ok. Currently on MATE desktop. Slightly sluggish but otherwise ok. For some reason on Debian (which would include Mint) the kernel keeps printing aqua lines of output which looks strange. I've got a serial terminal connected to monitor the situation in case Debian bombs out again.