I used a Garmin Streetpilot when we went to the UK last year and France this summer. It really avoided a lot of marital conflict when my wife was navigating. However, there is an odd thing about Garmin's. You can't buy a Streetpilot with the European basemap in the US. I ended up buying from a German on eBay.

In Europe, where it is apparently against the law to have roads go directly North or South or East or West and the government dishes out additonal funds if you can jamb over three roads into every intersection, it was a lifesaver.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13