HI Benny
I got my misses a SatNav a cheapo one from Pc world, its actually very good.
it was a NavMan that was on special, so I got satnav, carrycase, recharger, bracket for £175 the same price as the satnav on its own.
It works really well and is really simple to use, it hasnt got anything fancy on like if the roads are busy it will tell you, but it certainly well worth the money as it will get you from A to B no probs
also it is very quick at recalculating the route if you go off route in a different direction and shouting at you to get back on route at next right or whatever.
The only downfall with any SatNav is that they can take up to 15 mins to get started, they have to find the satelites in sky first at least 7ish, some days are quicker than others like 5 mins, so make sure you prepare for this before hand, this also happens with all SatNav's not just cheapish ones.
hope that was usefull