I use the Bluetooth model and love it. I've only had it for a week or so, but I already prefer it over my PowerBook. It's much more comfortable. And plus... it's sexy as hell. 🙂 It took a little getting used to because it does feel a little different than your ordinary keyboard, but once you get hang of it, it feels real nice. Also, it's quiet when you type. No loud clicking here. 🙂
Edit: As Heb1228 said, that's also a good point. Having the number keys on the right and regular F# keys on the top is really nice.