We bought the TomTom One XL and have been very happy with it.  I've checked out one of the Garmin's and I feel the TomTom has more destinations and cities than the Garmin, which is why we chose it. 

  We had some problems with our unit (there was something wrong with it from the factory, it seems) so we had to call the customer support several times, and they could not have been better.  I think the great customer service people is probably one of the best things about TomTom.  Every single person we spoke to was knowledgeable and very calming and able to walk us through everything, which...