i have had 2 previous tomtom satnavs,the first was the old box looking types that did everything it was supposed to, the 2nd was a XL type which also delivered well finely gave up as the screen did not respond to everything. so i had to replace and went for the via 135 after the great reviews. i must point out that i am a london licensed taxi driver and have found in the past tomtoms to be very useful in my daily life (us taxi drivers dont know everything).i use the tomtom mostly to look up a road that i may not know and then look at the route to see where the road is then go by my own route,only on very rare occasions follow the directions given. however this model using it in london it loses the signal so often if anybody does not know London would be completely lost. quite often it would show that i was driving in a road 100yds away or would show my position in the middle of a building, also the the screen would be revolving round and round trying to find a signal. also voice control just forget it, i would say an address in london and it would come back with an address in a completely different country.i have tried 2 of this particular model and both have worked the same, the first time i thought i had just been unlucky i am now in the process of returning the 2nd.i have been in touch with tom tom and they have given me instructions to rectify the problems but the instructions do not seem to do what its supposed to do. one plus point is Amazon for returns have been brilliant.