I second an above suggestion, if you want a real independent from phone satnav buy a Garmin, preferably with digi traffic (not traffic or live traffic or any other description of traffic but Digi Traffic) for less than £200 and you'll have a satnav miles easier to use and bang up to date.

Myself I like the Tomtom range - I tried Garmin for a bit but it used to make some strange route decisions,might have just been earlier mapping but it put me off.

Current version is the Tomtom Go 5200 and it works really well - especially the accurate traffic that I use all the time which is incredibly useful be it for European long runs (possibly not at the moment!) or for my awful daily commute. This device has given me back many hours/days of my life!

I also use the Brodit clip system that is a great way of mounting most models of satnavs to many car models - avoids having a windscreen suction cup mounting which can be poor for visibility especiallly when you are my height(hence bigjohn), the interior mirror of many cars can even be a problem here!

The Toyota handbook section for satnav is chapters long, and it's the most awkward frustrating thing to input and operate even if you use it regularly, works ok once programmed but nothing to write home about.

Never found any of the 3 generations that I have used awkard to input or operate. Similarly, I only find it frustrating when it doesn't suggest a route that probably only a local would know/use or quite the reverse where it suggests really minor lanes or a sleeping policeman infested road. To be fair though, other systems act exactly the same.

My gripes would be that it's slow to boot initially & input can be slightly laggy.