I have a Nuvi 360 with European maps loaded ( the 370 is basically the same
with maps preloaded which makes it cheaper than having to to buy the 360 and purchasing the maps as I did)

I used in Germany Nov 14-26th and it was absolutely fantastic.
All you have to do is just put in your destination ( in the case of a site like castles etc that have no specific address a nearby location)
We drove Frankfurt/Berlin/Munich/Nueushwanstein/Nurnburg/Bamburg/Wurzburg/
Frankfurt and many points in between. It was particularly invaluable in the rural areas of Bavaria were the entire landscape (not to mention roadsigns if they existed) was covered with snow.

The only problems I had was when I thought I knew better and thought it best to ignore the instructions.
I just cannot get over how useful it was in the cities telling you to keep on a specific side of a highway or road that was going to be eventually divided for example, or directing me to addresses which though seemed pretty easy on maps but were hard to access because of one-way or pedestrian streets.

The unit incidentaly, which is no larger than a pck of cigarettes can be used in a pedestrian mode.

mike

p.S. the Garmin website allows you to check out any area in Europe which you might be familar
with or plan to use it in to demonstrate the unit as it is being used. ( I had a friend try out a local area where he has a home in Spain and he promptly went out and bought the 370)