Did the self upgrade to 11.1.2. No trouble. 1 day running no crashes or issues!
setup:
server 2012 r2 virtual machine (will try 2016 in a month)
workstations - windows 10 fairly clean with minimal extra software 8yr old and newer at least 4 gb memory
Looked at Athena - expensive and demo has online lag
Looked at Praxis- love the idea but Dr. Low one man shop did not inspire confidence - a lot of "best" "done it a billion times" and demo crashed while adding a rule. await new 64 bit codebase - major undertaking to do well.
Looked at Charm - looks nice. not a fan of chat box in ehr prefer traditional message system ala AC.