Thanks a lot for testing! – and nice that the Release Candidate worked better! 
Maybe include some trivial things, like:
- Does sound work?
- Does network (wired/wireless)?
- If it has a webcam - does that work?
- Any other devices?
– I assume the first two are “Yes” (otherwise YouTube gets a bit boring) … but your word is better than my guess! 
Other that that, you should be able to run
qubes-hcl-report
in dom0 and get a report (that should include the R4.1.2-rcX & 6.1.X - but please check).
Wrt. suspend: There has been a few posts lately, about suspend … have you checked those?