<p>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. </p>

<p>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?</p>

I've experienced a lot of what you're talking about over the years as well, but I have to say having recently moved to the 4.0 version of ReSharper, a lot of that overhead has been cut down dramatically and it seems to be quite a bit more functional to boot.
Try it again. What's the worst that can happen? You'll uninstall it again? No big loss.