Im looking at getting a new stereo and sat nav for my car (punto mk2)

However, i like the idea of the double din (i think) units so ive been to a few places and found this one http://www.halfords.com/webapp/wcs/..._productId_707793_langId_-1_categoryId_165685 which is in my price range, just wondered if anyone knows much about it, or knows any alternatives as such.

Any help/ideas would be greatly appreciated