Here's some additional info on the Navigon 2100 units at Staples....
I was at a Staples last night and saw the unit on display as well as a new one in the box (got it from the back for me).
Today at a different Staples I did the same thing and there was one major difference in the packaging. The one today had a sticker on the box that said as a limited time promotion it included the lifetime traffic ($99 value) free. This sticker was NOT on the box last night.
The price was the same (currently on sale for $175). I assume the stickered box is the unit to be sold on BF for $99.
I agree with the comments a few posts above about the feel of the unit. The way they do the alphabetic keys (on a 5x5 type grid to the right) makes it a bit more difficult to hit the right key, especially if you tend to fat-finger the keys. I also thought the unit did seem just a little sluggish, but the screen seemed to have very good resolution (subjective opinion) in the store.
It's probably not a "great" unit in and of itself, but getting a name-brand unit with up to date maps, TTS, and lifetime traffic for $99 (even $175!) will be very hard to pass up.