I upgrade my Dinc to 2.2 and my wifes with NO issues
Do a clean wipe of you device and sd card Do at least two hardresets and your are good to go- also watch any software you install DO NOT Install any task killers at all 2.2 is good at controlling system resources
we havebeen on 2.2 for about a week with no Issues.
Battery Life is good
Quadrant speed 1295
Speedtest 1.8 down 800 up
touch is spot on
Volume is great
No issues with setting up mail i have 3 accounts 2 pop 1 imap
GPS is exact and fast
Your mileage may vary