What Url rewriter do you use for ASP.Net?

I've looked at several URL rewriters for ASP.Net and IIS and was wondering what everyone else uses, and why.

Here are the ones that I have used or looked at:

• ThunderMain URLRewriter: used in a previous project, didn't quite have the flexibility/performance we were looking for
• Ewal UrlMapper: used in a current project, but source seems to be abandoned
• UrlRewritingNet.UrlRewrite: seems like a decent library but documentation's poor grammar leaves me feeling uneasy
• UrlRewriter.NET: this is my current fav, has great flexibility, although the extra functions pumped into the replacement regexs changes the standard .Net regex syntax a bit
• Managed Fusion URL Rewriter: I found this one in a previous question on stack overflow, but haven't tried it out yet, from the example syntax, it doesn't seem to be editable via web.config

+1 UrlRewritingNET.URLRewrite -- used in several hundred services/portals/sites on a single box without issue for years! (@Jason -- that is the one you're talking about, right?)

and I've also used the URLRewriter.NET on a personal site, and found it, ah, interesting. @travis, you're right about the changed syntax, but once you get used to it, it's good.