My big issue with Blackberry is the plain design. My Nokia E350 at least had an aesthetically pleasing text menu. My Curve 8520 makes it look like notepad. Doesn't sit well with me. I also don't like how hard it is to upgrade. I've been ritualistically trying to upgrade to OS5 but my phone apparently doesn't consider RIM a secure source and won't let me. The phone itself works though, so in that regard I can't complain.