I switched back to JB2/JC1 for the following reasons:
- unstable (I suffered from the black screens after each phone call, and the whole calling/contacts app was very slow), loads of force closes
- gmail app didn't want to start
- (known issue) camera (and therefore barcode scanner) don't work
- sure, there is a NL locale, but still no NL T9 as far as I can tell. I don't need my OS to be in dutch, but my typing speed is a little slow without T9 in dutch
I really like this (nearly) vanilla Android 2.1, though. I don't think there's any need for Sense or any other shell over top of it.