I ran for like 3 weeks with it factory setup. I hard reset a week ago and skipped the customizations. I have not found a thing missing. And my opera mini no longer hangs
.
I don't use Oz, Live, Sprint TV, Sprint Music Store. The customize does update these a bit. But even if you want them, you need updates anyway and I think most all the updates are full kits. You can also run any Customize step by hand if you found you needed something.
Fittske, to skip it, you need to Hard Reset and when it pops up a Message Box that says "3 seconds..." after the first boot. You hit the Soft reset button immediately when you see that box pop up.
__________________
EVO 4G, Stock Sprint ROM, ProClip in Car, Sony HBH-300.