I have this one: http://www.ergogeek.com/index.php?ta...product_id=549
(actually an earlier model) - and paid about $70 two years ago.

Fits in my brief case/goodie bag. No real complaints - quick fix times (much better than my sons Garmin). Works well with maemo mapper, wayfinder maps, roadmap etc.

Its about 2/3 the length of a business cart. Charges from usb.
Used last night - and it ran for over 6 hours on a single charge.