very good - does what it says on the tin; works a treat in my wifes Focus C-Max, which has such a large sloping screen using the windscreen mount meant you couldnt reach the tom tom touch screen easily to make en-route adjustments now you can
the unit is big/heavy and doesnt move when the car does - it is quite bulky to store though; you need to store it out of sight of course to stop those awful thief types realising you have a sat nav and it might be in the car!
in the C-Max it fits between the front seats under the dash ncely