The maps look totally different but not in a bad way, the voice directions are not as good but still adequate.I have just changed from Tomtom to garmin and both have their benifits.
There is ONE BIG difference that you may not know about, TomTom with TA mapping software in NA is inferior to the NavTeq mapping software. Now the TomTom rider with the NavTeq software, it actually performs much better then the other TomTom's that is available for the automobile market.
The TomTom Rider seems to process much faster and offer better routing due to the NavTeq software which is also utilized by Garmin, Magellan, Lowrance etc.
If you did not test the TomTom Rider side by side with a TomTom 700, a Garmin 2720, C340, Nuvi 350, you will not know the difference, but there are alot of issues that is in the normal TomTom 700 that is not found in the new TomTom Rider.
TomTom makes the unit simple, sometimes to simple, it does not offer to much verbal commands or information and it does not tell you which side of the street the address is on when it arrives. There is no POI address when selecting POI's and you can't chose the City that the POI is in.
But it does have Bluetooth handsfree phone feature and traffic and weather information if you utilize their TomTom Plus optiion features.
The TomTom Rider is design for a motorcycle, and we ride motorcycles. So I would guess for what is worth it is a good unit for most.
Just my 2 cents worth by I have ALL the GPS units that is mentioned here to compare with, including some GPS units that is not yet available in the market, so when I say I compare these units, I really test the differences and see the issues and the benifits.