I have configured a couple of Gnatboxes v2.0 and v2.2 and I just had a client purchase a GB-100 and I am really impressed! I got my last company to purchase Gnatbox v2.2 but they wanted something in a pretty package so we never used it and I ended up with a bunch of Watchguard Fireboxes. And all they have on the Gnatbox is a pretty package and some cool monitoring tools. I had the GB-100 contected via ADSL configured and up and running in about 45 minutes (with PPTP). I haven't had to reboot it once since I turned it on unlike the Firebox which has to be rebooted for any changes.
GTA rocks! Please get us the GB-200. I need one for my co-location Web site in March! If you need help with getting custom rack mount cases I have had great luck with TriMap International http://www.trimapintl.com I have been buying from them for over 4 years now and they have made me some custom cases as well. Ask for Jim Ford 925-447-2030 x1102 Andamo Deming
