Sat Nav.

Back in March I wrote I hadn't entered the "sat nav" crowd, well the situation has changed somewhat since then.
I now have 2 sat navs, one sort of works the other doesn't. I'll explain, the one that actually does sometimes work was a gift from a mate, he meant well but sadly bought the cheapest sat nav he could find, for £20 more he could have got a decent one. The one that's dead was given to my brother but has a fault, it was hoped I'd be able to fix it, but to no avail.
Do they work? well yes and no, if you get a good one and your lucky then they can be brilliant! on the other hand if you have a crap one (like me) and your unlucky (yes like me again) then your screwed.