TomTom ONE XL V1 Great Britain Satellite Navigation System

I recently replaced my Tomtom Go for the One XL. The larger viewing screen is excellent navigation is a breeze and as with all tomtom products it effortlessly recalculates a new route if you go wrong without making you go back over previous roads. I would have given it 5-stars but Tomtom have spoilt an excellent unit by supplying it with a dreadfully inferior mount. The windscreen mount no longer has a locking clip to secure it to the windscreen so it tends to fall off while your driving. They have also made the arm very short so once you have secured the mount to the screen it is extremely difficult to attach the unit as it is too close to the glass and near impossible to remove it, unless you remove the mount as well each time and then you start all over again. I have given up and puchased an after market mount from a different supplier. But considering the price of the XL it should come with a useable mount similar to the other products in the range.

Let's get the bad news out of the way first
1) The supplied windscreen mount isn't big enough. In my car I couldn't even touch the screen from a driving position. I bought the Alternate Mount Kit and that came with a dashboard mount so my Tom Tom is now in a perfect position (and easier to remove too)
2) I bought the traffic edition of the TT One XL and I have not yet been able to get the RDS traffic alerts to work at all. Internet forums are full of people saying that TMC just doesn't work.

Otherwise - it's an excellent piece of kit. Route finding is spot on, the maps are very clear and the interface easy to use. I especially appreciate the warning sound when I stray over the speed limit.

A couple of tips
1) You really must update the device every few days using the excellent Tom Tom Home software to maintain the GPS fix information - otherwise it can take several minutes to lock onto your position
2) Don't enter your actual home address as your "home location" otherwise it becomes a homing beacon for anyone who steals it. Instead enter somewhere close by such as a supermarket or police station.

All in all this is a very good satnav unit. Having previously owned a Garmin Nuvi 660, and having returned it due to the appalling TMC reception, the access to TomTom Plus traffic services is a definite plus. The TomTom also has much more customisability than the nuvi e.g. you can define an itinerary, or set a route that avoids a particular road.

However, there are other things that I miss. The display of traffic info when browsing the map could be simplified. It is often hard to read, and clicking on the traffic POIs can be a challenge while driving. However the unit does highlight delays relevant to the route, although the calculation of delay times appears somewhat exaggerated, and should be taken with a degree of caution. In fact, the TomTom's calculation of journey times in general appears to be on the high side.

The other thing I miss is the text-to-speech facility that allows the nuvi to tell you which street or motorway you're driving on. And the nuvi also highlights mobile speed camera zones, while the TomTom only displays fixed camera positions. Talking of display, there doesn't seem to be a way to get the TomTom to switch automatically from day to night-time display. There is on the nuvi.

Accessing traffic data whilst en-route also ties up the bluetooth on your mobile, and my phone is unable to connect to my hands-free device at the same time. As the One XL doesn't support hands-free calling, this is a big minus for anyone who wants to use their mobile phone legally on the road, and access Plus services.

Finally the windscreen mount, as mentioned by others, is prone to falling off on a regular basis. Unlike the nuvi's.

All in all, a perfectly functional device, albeit lacking some useful features, and a little overpriced for what it is - you're essentially paying a premium of around 70% on a TomTom One, for the privilege of a wider screen.