I can't say that I have any problems with my Incredible and I bought it a year old off Ebay. The battery life (after a month or two of getting used to life with a smartphone) Has been holding me 14 hours (Until I got the update, now I'm sitting pretty at 36 average) and I'm probably considered a heavy user.
I don't use sense, I have GoLauncher.
I didn't have any problem with any of the Gingerbread updates.
and I have never had the low memory problem (Hopefully I didn't just jinx myself)
The only gripe I have had with this phone is it has a tendancy every 2-3 months to refuse to load my memory card. Which is a simple fix- Copy files to computer-format card- replace files. Nothing major.
But, I also am a phone junky. I am looking for a new phone in the coming months...