This exceptional product is easy to transfer from car to car, and with very good mapping and 3D display. Easy to use. I bought the US maps (which just slot in to replace the UK map card) as I travel there frequently, and pop it into my hire car and follow the instructions to obscure destinations like office parks and hotels I don't know. Last trip my flights from Maine were cancelled at the last minute, and I had to drive 6 hours to get to Newark airport - and my tomtom friend took me there without hesitation through multiple freeways and turnpikes. I even booked a room using the phone numbers displayed for hotels. Back home, just replace the map card and it will take me to any UK address. At the same time, it's a handsfree for my bluetooth mobile. Fantastic, and worth every penny (or cent).