I have owned the Tom Tom One Version 4 for the past 12 months and have found it nothing but brilliant.

I previously owned a very cheap sat nav and I can honestly say I can definitely notice the difference. I don't really know a whole lot about sat nav's but the difference I noticed was amazing - the cheap sat nav took ages to find a satellite signal and the routes it took me on were horrendous. However the Tom Tom One V4 was the total opposite - it found a satellite signal relatively quick and always took me on the quickest route.

The Tom Tom One V4 is a brilliant design - it is very small and compact and would easily fit in your bag. I also found it brilliant how this version of the Tom Tom has a built in car mount so you no longer have to bother carrying this around with you! The built in mount is basically a suction pad that you lock into place by turning a wheel like operation. I can speak from experience that this suction pad does really work and I have never found the device to fall off the window.

I dont really want to list all the features and things that can be changed on the handset as most people who will be potentially buying this product will have a good idea of its specs. I would briefly say that the device can be updated by connecting it to a computer using TomTom Home (Tom Tom's software) - some updates are free and correct mistakes with routes/maps. There is also an option to submit map corrections yourself however I have not ventured into this so can not comment further.

The two things I don't like about the device are first of all the battery life isn't brilliant. It's hard to estimate how long the device lasts as a whole due to me using it every now and again however I do find myself charging it a lot. Another thing I don't like, this point is Tom Tom's in general - they don't come with a wall charger. The only ways to charge the device with the accessories included in the box are by car charger and USB connection to PC/Laptop.

Overall I would recommend this product as it is very reliable and with the built in car mount it is a brilliant compact device. I paid £80 for this item and I feel it is definitely worth that price.