I find them exceptionally useless. They are small and fiddly and the 'internet' access is a bit of a joke. I tried using a GPS one in a car and it was not terribly good, I would suggest a 'proper one' if you think that you will ever need GPS. They may be of use to businesses but they all seem to use laptopps in any case. Sorry to be negative but I cannot think of a single reason to buy one.