The TomTom systems have a 'Simple Menu' function if you find them too feature rich. I have found them to be the simplest most effective portable navs I have ever used. I'm running my old Navman icn520 this week and it has nothing on the TomTom. Ugly maps, confusing directions, lack of lane designation when multi lane. The TomTom is great at stating which lane you should be in.
Still prefer built in, but that's another story!