Trying it out now. Works with EFI booting out of the box. Never booted into Windows other than to test that it turned on and touchscreen worked.
Currenlty figuring out why the following is showing:
1. Freezes on resume from suspend.
Tried shutting down all VMs and it still happens, so I suspect it's not the same fix as:
https://groups.google.com/forum/#!topic/qubes-users/81t26xq4MEI
2. HCL script says no TPM, but I definitely have a TPM.
3. Touchscreen isn't working. I haven't put any time into figuring this out yet.
Install was easy. Setup was otherwise easy. I currently have it set on UEFI only, disabling CSM (Compatibility Support Mode)