It's pretty hot. If you use the included UNIX network stack, you can support WAY more connections more efficiently than WebSTAR can. It also has caching, so pages, graphics, and files are delivered much faster. The feature I appreciate most is the clean virtual hosting. I've been using Userland Frontier for all cgi-scripting.
Frontier works great with it.
Seems speedy and stable. I'm very impressed. Thanks for coming up with such a fine product. It is an ideal solution for Webmasters. I use NetCloak and WebCatalog.