I recently replaced my aging Magellan Roadmate 700 with TomTom One XL Europe, I like the support software which runs on the Mac and the availability of POIs.
Compared to the Magellan (which had a 2 GB hard drive for map storage) TT is fast and accurate, I like map share and the ability to correct map errors.
TT One XL has a wide screen and with no other built in toys has kept it slim and light weight, it has never fallen off the screen.
To my knowledge there is no GPS unit that can be programed for large vehicles and TT does not route around the low bridges only giving warnings when approaching but I believe this will be incorporated in future software updates.
What else can be said, if you want a 'swiss army knife' GPS with mp3, blue tooth phone, picture files etc etc etc TT One is
not for you but if you want a good solid GPS unit with all the maps of western Europe, full UK 7 digit post codes with an easy to use touch screen interface, runs straight out of the box and doesn't need a two day course to learn then I highly recommend it, and it won't break the bank ..
10/10