As I said at the start of this review, the B-4000 isn't for everyone. It's really more of a specialized product for folks who want to run their own wireless hotspot than an 802.11b wireless router with built-in per-user authentication. Given its intended audience, I'd like to see ZyXEL improve the documentation with better explanations that don't just say what each feature is, but that also explain the how and why of them. Getting rid of the errors, references to the ZSG-100W, and improving the language usage would help too.
What doesn't need improvement, however, is the excellent wireless performance and fast routing speed, which are among the best I've seen in any 802.11b product!