i bought a tom tom go 700 the day i picked up my coupe and i have to say its ridiculously easy to use. So user friendly and with it being touch screen its dead easy to control. You also get a free years subscription to the speed camera service if you buy from certain places e.g. staples. Which is handy.. althought i havent updated mine in months and got caught out speeding in some roadworks on the motorway
. But definitely worth the money, it comes with a cigarette charger but can also run off its own battery which has lasted me up to 4 hours on my way home from uni.