I had a TomTom 510 that died after 3 years of use/abuse.
This TomTom is less than a 3rd of the price I paid, starts up faster (locks on to GPS quicker), quicker deciding which route to take, smaller unit - much welcome! With a smaller much better suction bracket.
Best value sat nav by far, my last TomTom 510 had bluetooth hands free and all other 'stuff; that I just didn't make use of.
You won't go wrong with TomTom or this model.