I bought mine and ran it on an Orange c500 two years ago nearly, now have it on my c550. I hear tomtom is better, but this was out before tomtom and came with speed camera alerts all pre-loaded. it's not the most intuitive S/W, nor is the GPS receiver I have (size of a packet of cigs almost; branded CoPilot) anywhere near as good as recent chipsets a la tomtom.
The CoPilot 6 looks v. swish tough, thought of upgrading to it myself.
It's a godsend though, as any half decent satnav is