Garmin Satnav (Castle MK40)

This satnav works perfectly, but it is about seven years old and can't be updated as the software in this particular model is no longer supported. There will be new roads that it doesn't know about, and housing estates that have popped up in the last few years that it can't cope with, but basically it is reliable until it isn't, and an awful lot of roads haven't changed significantly, so it still has a lot of loyal service to give.