6.8 works on 3 advance without problems. all others versions lags/reboots etc (for me)
9.0 testing
I use Cocore 8.2. long time without lags, freezes, hangs, etc..
Happened a reboot , but only one in months using normally.
Totally Acceptable.Probably no connection with JB Stock or kernel. But Android itself
Dialer, message, etc..Only replaced and solved.
Stock camera has also worked well. Just always use internal storage and no more problems.
Launcher: "NOVA" . Smooth and without lags.
Anyway, using for months, I have no more complaints about stock JB.
SGA is not the fastest smart and has only 768 RAM, but everything works fine with JB Stock.
Of course I'll try AOSP or CM in final version.