I have seen Jetbrain's ReSharper tool on many "must-have" tool lists. I've installed it on a few occasions over the last few years and it's turned my Visual Studio sluggish and erratic. I generally uninstall it after a week or two because it make VS flaky, I want to like it, but I can't get past the instability.
So what's the deal? Am I having bad luck? Does the tool have issues but the usefulness out weighs the issues? Anyone else out there have trouble with it? Are there some troublesome options to turn off?