Believe it or not it may depend on if you want to tour Europe or the U.S.A. Or if you just stay in the UK.
Last year on route to one of my Europe trips, I knew we would be going outside the EU into Poland and the Czech Republic, and my old trustee original Tom Tom 300
didn't cover them, I stopped off at Halford's and bought the latest Garmin.
I could not help than to be very impressed with the options, displays and layout of the new machine, and of course, as one would expect with development, the smaller mounts and housing too. The display is much brighter than my old machine, so much so, I can't believe it always was so dim in bright light but what about navigation?
There are aspects of the old 300 that I like much better than the new Garmin, but the reverse is also true in other aspects. Madam TomTom is much calmer and clearer in vocal directions, and I can visualise yards better than I can decimals of a mile for example. I also like an ETA as opposed to time to run and the compass direction is very useful even without any mapping. So that even out of area, Tom Tom still gave a compass heading. But why oh why was Madam Garmin losing satellite connection so much when Tom Tom wasn't? If satellites are geo stationary? Why does this happen? And are both systems using different satellites?
Losing Sat Nav on a long leg of motorway with no expected turn offs is quite bearable, but certainly not when negotiating a large metropolis for a specific location, or a series of major intersections. The last thing a safe driver needs is confusion about direction. Garmin dropped out on us so regularly in Europe at crucial moments, I was so glad that I still had Madam Tom Tom guiding us in instead.
So if you ask me 'Which one to buy?'. For Europe it has to be TomTom.
But I will add that a lesson learned when staying in a large city, is to always carry city street maps so that if Sat Nav fails, as both did one night just before negotiating Paris, you can at least revert to the old fashioned method. We now have maps of Paris, Vienna, Zurich, Geneva, Prague and Dresden in our door compartments because Sat Nav can be very unpredictable no matter which brand.