Well, I've used InstallShield 5.x, and they are buggy in subtle ways if your install is complex (with many components and dependencies). The installs I've done have nasty code in places that are workarounds for IS bugs. Also, IS was totally unhelpful as far as support. We were doing an IS install from scratch during the development of IS 5.0, and they flat-out refused to acknowledge bugs in their product, even when we sent them our install so they could reproduce the bugs. I've also used Wise for Windows Installer. The IDE is nice and usable, but it's got bugs too. Again, it's workable but be prepared for IDE crashes. The Wise docs are also useless, they're just a rehash of the dialogs (as in, "this edit control does blah", "this checkbox does blah", without telling you why you should be using those controls). There is also InstallShield for Windows Installer. I've never used it, but see my earlier comments about IS. Good installers? Gksetup. :) Free for non-commercial use. For commercial use, you just have to send the author one copy of your product. I just checked that site, and there's now a professional edition. That wasn't there the last time I visited, so I don't know anything about its features.
