I received an unexpected gift this year during the Holidays. It took me a while to test it out sufficiently enough to warrant a review, but I'll get to that later. I don't think my difficulties were gear-related, just an unfortunate coincidence. Once I got past the network difficulties (I use T-Mobile as my provider), the software and GPS merged nicely on my Blackberry Curve 8320 for a great driving experience.

Looking at the contents of the box, you can hardly tell it's a GPS. It simply looks like most other phone/pda brackets that use a suction cup to stick to the windshield. Housed inside is a Bluetooth-enabled GPS. After a minimal amount of setup (pair the GPS with the Blackberry), the 'berry was receiving satellite signals and able to pinpoint my location (within 20 meters, according to Google Maps) almost immediately. Here's what I did to get set up:
Put the pins in place (they're rubber-coated and adjustable) to hold the phone.
Attached the suction cup to my windshield
Plugged in the power adapter
Plugged the mini-USB power cord from the GPS to the Blackberry (not strictly necessary - it just keeps your battery from running down)
Paired the GPS with the Blackberry
Fired up Google Maps and set it to use the GPS

That was it for my test run. The only problem that I had was that the power cord from the GPS to the Blackberry was difficult to insert (I thought it was defective) into the GPS unit. Google Maps recognized the GPS and pinpointed my house. I did some travelling over the weekend and the GPS tracked perfectly. One really impressive feature was using the GPS while viewing Google's Satellite View. Accuracy was good enough to put me on my parents' driveway, which is off a road that doesn't appear in Google Maps (seriously). I spent a few days using this software as the exclusive interface to the GPS, and was duly impressed.

Next, I installed the software from Garmin (a one-year subscription to their service is included with the device). This installed OTA (Over The Air) and only took a few minutes on my WiFi network. I didn't get a chance to road-test it, but it was clear that the software provided a bit of functionality over the Google Maps application.

Then my Internet connection died. I spent three weeks working with T-Mobile to sort out the problem, which ended up being a change on their end. Once that was ironed out (I'm leaving out a lot of irritated phone calls and emails), I was able to road-test the software.

The Garmin software for Blackberry worked great on my test run. It provides spoken turn-by-turn directions (including street names), adjusts to changing lighting conditions, HUD, overview map, driving map, upcoming turn indicator, and integrates with your Blackberry contacts. I have not found a way to get my actual GPS coordinates at this point, but with the wealth of features, it might be buried somewhere.

The overall experience with the GPS, notwithstanding the problems with my Internet connection, was a great one. I wouldn't recommend this unit (or any device which downloads its maps via a wireless connection) for hard-core outback camping. I would say that it is probably a good fit for someone who does a bit of car-camping, though. It can ease finding your site if you can get a 'net connection on your Blackberry, but if you're out of service, you're out of luck.

I'm only going to give this GPS a two-campfire rating, since we're talking about camping here. If you want something that you can use both in the car and on hikes, look for something else. Being able to see your location superimposed on satellite imagery (via Google Maps) has some benefit, and that bumped it up from a one-star rating.

Additional Information:
This is a discontinued product from Garmin. I discovered that it was a $50 purchase from Woot! which is a pretty good deal. If you're looking for technical specifications, the Garmin site is spartan. I found this site which has some good details.