I picked up a D4 on swappa, got it today so got ICS too.
A few questions:
1) How do you disable widget scrolling? It's driving me nuts on Simple Calendar!
2) Is there a way to force only 3G? I get crappy service at home and it's just switching back and forth, depending on what room I'm in. That's gonna kill the battery and a few times it has been with no signal. UGH.
I activated the phone, updated to ICS and did another factory reset right away. So far I am not having any problems, that I know of.