I downloaded this app to my HTC Desire recently. Cost was around £28. Plus Points: Accurate navigation Able to drag routes to make detours from the suggested routes. Points of interest works well for finding Hotels etc. Has several different modes including Motorcycle and walking. Route planner works pretty well too (just input Cat & Fiddle route for Rally rideout) Speed Camera warning Programmable warning when exceeding speed limit by a set amount (+5mph, +10mph, etc) Junction lane view indicating which lanes you should be in approaching a junction. Live Traffic bar on side of screen indicating if there are any delays in your current route and will reroute you if there is significant delays. Minus Points: Small Screen (but to be fair that is more a function of the phone than the app!) Not too many options for route planning (ie, avoiding motorways, tolls, etc) Some of the automatic route choices are a bit bizzarre particularly if you select Shortest route! (Could take you through the middle of towns rather than around them) Don't work with Tyre (But then again my TomTom Via 130 don't either.... ) I use this in my car all the time as I can play my music on the phone at the same time and use the handsfree when necessary. Apart from the screen size (which I may address in the near future with a Galaxy III when my contract expires) I think this really works well as a Sat Nav. I'm really pleased with it and think that the price is also pretty good compared with buying a dedicated Sat Nav. So, Phone, Sat Nav & Music player all in one device saving cluttering the dashboard with various bits of hardware.....