When i first saw this software i must admit i was quite sceptical i thought i might be a condensed version of the regular tom toms. However I was completely wrong, everything is the same you've got access to all the same features such as POI's, speed camera positions warnings (fixed and mobile), tom tom live traffic, and you also receive a tom tom home CD (which allows you to connect to the internet, update your maps, browse your files on your device and memory card and a huge download data base to download voices, languages, sounds etc..) The software itself IS VERY STABLE and there's a huge range of phones it's compatible with. I've personally used it on an i-mate JASJAR and an HTC tytn 2 and it works perfectly! I would have to say though that you need to check on tom toms website for compatibility. Also a point to note is try to make sure your phone has a decent size screen as it may be difficult to see the maps and text clearly. Installation is a doddle all you need o do is push the tom tom SD card into the slot and for 1st time installation follow the instructions and within 1 minute AND you're done! THIS REALLY is genuine plug and play software it is 100% reliable as I've been using it for 2 years now and it's never let me down yet. One of the best features it the live traffic update service that can let you know if there's any traffic jams, lane closures or hold ups on your route. Once again this is an amazing feature as it can really cut down waiting in traffic jams ( a real godsend!) also you have access to weather services and tom tom buddies (which lets you know if any of your pre programmed tom tom contacts are nearby). The only downsides are its expensive to buy an rrp of around £89.95 (for the latest version) on their website although i have seen it for much cheaper at Handtec and other online retailers. Another bad point is that some of the add on services also carry a subscription charge per year and you also need an active internet connection for live services also so check with your service provider. Also some older phones require an external gps device (cost around £15- £60) because they do not have built in gps so factor that into your budget.