well there was a thread on here last week. link is
here
Good little unit for a good price - can be had online for under £200 now. My main problem with it is that it is very difficult to get speed cameras onto it - it can be done but requires some workarounds.
In some ways it functions like some of the earlier all in ones, albeit with a nice build and a nice screen.
If you don't need speed cameras, or bluetooth support, or mp3 player, then its a reasonable option.
But worth bearing in mind that you can get the nuvi 310 for £300 which has bluetooth for in car handsfree, and mp3 player, and it has a dedicated application to upload points of interest including speed cameras. Yes its £100 more, but good to know your options.