Helicon ISAPI redirect or URLRewrite.net Managed Code redirect?

We have a web application that currently uses URLRewrite.net, and I'm thinking about pulling it out to use Helicon's ISAPI rewrite 3.0.. We have about 100 redirect rules of varying complexity and both redirect solutions can do the job, but I'm looking to free up managed code resources for our site. I'm thinking of these links in particular: Tess's blog and Kurt's blog.

Does 开发者_开发问答any one have any experience with either product? What did you think?