I have started upgrading my 45 odd X2CRM clients throughout South Africa. Still have to do about 10 but so far not one problem. Wow, well done.
I have been playing with v8.0 on our own primary system since its release and haven't found issues. But still playing, holding thumbs as some of my customisations with client systems is quite intense.
Still a super happy X2CRM user and advocate!