Let's start with the strengths of the EL-610. The keyboard is very small and lightweight. It easily fit into my briefcase without adding any noticeable weight or bulk. To its credit, it also absorbed the beating that my briefcase tends to take without a problem. The keyboard worked on Windows 2000 Pro, 2000 Server, and XP Home without needing any drivers or special software.
The glow-in-the-dark quality of the luminescent keyboard provides the ability to type via the "hunt and peck" style of non-touch typists while in a low lit or dark room. This quality, combined with its light weight and size, makes for a nice laptop accessory. This is especially true for laptop users who do not like to sit very close to the LCD screen. The caveat here is that the feel of the keyboard isn't much different of a laptop. So, if you're looking for an escape from that laptop keyboard feel, you won't find it here.
Zippy EL-610 vs. HP Pavilion Keyboard
The ability of the keyboard to work flawlessly with Windows 2000 Server appealed to the network admin in me. If you have mulitple servers but don't have a KVM switch or the space to keep multiple keyboards around, you'll find that this keyboard works quite nicely. I was able to just plug it in, wait a couple of seconds for the server to pick up on its presence, and type away. For this alone, it has found a place in my tech bag.