When you ask about a GPS, presumably you mean the kind that you use in the car, to guide you down the streets and roads (as opposed to the handheld kind that you use for hiking, geocaching, etc).
There have been previous discussions of these street-mapping GPS units, and a search will turn up some of them for you. I think the general conclusions have been
1. Almost all of them are very good
2. Probably more than 50% of users bought a Garmin Nuvi of one flavor or another. There are many models.
3. Any of them can make a mistake, so you should always have a paper map, and don't trust it if it seems to be doing something stupid (people have died from doing this)
4. If you want fancy, you can get fancy, but it will cost you. "Fancy" meaning spoken street names, Blu-tooth, traffic advisories, etc. If you can settle for plain, you can save some money. It is the same receiver inside. They are all equally accurate.
5. They are cheap enough that you can go with a name brand. There deosn't seem to be a reason to buy an ultra-cheap Chinese knock-off.
6. They are very useful.
In many cases, the manufacturer's web site is quite pricey. Shop around - many of us have bought from GPSCity, for example.
Bill
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