Tomtom are still the best, but having an older version running alongside a current version, you notice some stupid things going on with the new one which is just dumb! I'm talking about route planning. Any Tomtom will get you there, but you really must check the route it's chosen to ensure it isn't being silly.
I was travelling to a place near Bergerac in France last summer. Old version chose a 30m shorter route and offered a 2 minute shorter journey even though the maps of the area were identical.
I "back to backed" these two units over time and found that the route planning was not as good as one would expect.
Earlier versions of Tomtom allowed you to set speed cameras as an overlay, but now this is handled differently so Tomtom can charge you an annual subscription. I must see if I can use the old overlay, but i'm guessing that they will have put pay to this.
Another minor niggle is that that the current Tomtom's tell you when you are approaching a junction and need to take instructions. There are no less than three warnings which can be a tad irritating. The earlier version tells you just the once – much better. I guess they are pandering to "numpty". I turn the voices off now.
Tomtom are still the best satnav with a super slick UI and great online update support etc.