I hated every attempt at static analysis until I started programming with Xcode. In my usage, Build and Analyze is always right -- that's the difference. Other tools (lint, FXCop) are too noisy. Even warnings in some compilers are an annoyance that you have to code around to eliminate.
Fxcop is massively overused. The rules are designed for teams who are building libraries and frameworks (thus the name, Fx is short for framework). For ordinary app development many of the rules are inappropriate, which can lead to an impedance mismatch and frustration.
Yeah, I read that Objective-C got it's ARC feature after static analyzer was integrated to Xcode. No more manual reference counting is definitely a plus.
