From The Cheeseheads
Normally, I use a Garmin Legend to get me to the caches, but recently I've been using a different unit in the car to actually get me to the caches when I'm in an unfamiliar area. It's the i.Trek M1 Bluetooth GPS. It's a tiny unit, about the size of a magnetic key container. It has no screen; in fact the user interface consists of simply an on/off button, and two LEDs to let you know its status.
The key to the unit is the Bluetooth functionality. I use Microsoft Streets and Trips to help route me around and to show me where the caches are in the area. In the past, I hooked up my Legend to the laptop, but since I only have USB ports, I also had to use a USB/Serial adapter which, combined with the laptop's power cord, left me with a tangle of cables in the front seat, as well as the inconvienience of having to plug and unplug the GPS at every cache. With the i.Trek, I just turn it on, toss it on the dashboard, and forget about it. The bottom is rubberized, so it doesn't slide around. The Bluetooth connection means no extra cables hanging around.
Positive:
1) The battery lasts for a reported 20 hours. I've never tested it, but I've gotten it to go for at least 14.
2) Included accessories: It came with a carrying case, a car mount, a car charger, a USB charger, and a wall charger.
3) Price: It was only $75 online.
Negative:
1) It sometimes loses signal when driving in an area with tree cover.
2) It can't do anything like saving your route on the fly for you to download to your computer later on.
3) It's easy to lose because it's so small!
Oh, and by the way... My laptop is a Powerbook. I use VirtualPC to run MS Streets and Trips and it has no problem connecting with the iTrek!