I have been using V8 and overall have been happy. The instant spell check is very nice (but you cannot use right click for templates if you have it turned on

). It recognizes most medical words. It seems stable. It has the ability to create schedules for any user, but I personally did not need to use that. I do like multiple preferred pharmacies.
Biggest problem is that it is slower than V7. It is a memory hog (but so is V7) and often will ramp up to 250 to 400 MEG of ram when you check in Task Manager.
Again, for me it has been stable. But then again, other versions were OK for me but problems for others.