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 GPS Devices usability : "gps device usability"
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Map capabilities
Internal (51)
Display Size
3.5 in. (18)
4.3 in. (8)
Resolutions
320 X 240 (23)
480 x 272 (13)
240 X 320 (5)
160 X 240 (3)
120 X 160 (2)
220 x 176 (2)
Included Software/Maps
USA Maps (33)
PC Interface
USB (38)
NMEA 0183 (18)
USB 2.0 (12)
USB 1.1 (6)
Mini USB (4)
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Built in memory
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Antenna
Built in (51)
Flip up (5)
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Automobile, Fixed, Internal, Touch Screen, Released: Mar 06
Recommended
77% Positive
77% Positive
Navigation: 
Good
Display: 
Good
Maps: 
Excellent
Usability: 
Excellent
Based on 16 expert reviews.
Usability : Excellent
95% Positive95% Positive
  "Zip code lookup is a nice feature not available on all GPS units, and allows you to search for a street name based on zip code rather than city name."... Gpsmagazine.com
  "especially nice feature is hands-free calling via a Bluetooth connection"... Gpstracklog.typepad.com
Automobile, Handheld, Internal, Download maps, WAAS enabled, Keypad, Touch Screen, Released: Aug 03
Average
51% Positive
51% Positive
Navigation: 
Good
Display: 
Good
Maps: 
Good
Usability: 
Good
Based on 18 expert reviews.
Usability : Good
71% Positive71% Positive
  "the built-in GPS software is excellent and seems well supported and maintained on the Garmin web site"... Brighthand.com
  "Integration with the Palm address book is helpful: Tapping the "Route to" button automatically generates a route to any address on your contact list"... Pcmag.com
comparison chart
Automobile, Fixed, Internal, WAAS enabled, Touch Screen, Released: Sep 06
Recommended
73% Positive
73% Positive
Navigation: 
Excellent
Display: 
Excellent
Maps: 
Good
Usability: 
Good
Based on 19 expert reviews.
Usability : Good
69% Positive69% Positive
  "The thin-ness of the 660 makes it ideal for travel, as you can easily put it in your pocket and take it with you."... Gpsmagazine.com
  "solid portable navigation system"... Review.zdnet.com
Automobile, Fixed, Touch Screen, Voice Command, Released: Jul 07
Highly Recommended
84% Positive
84% Positive
Navigation: 
Excellent
Display: 
Excellent
Maps: 
Excellent
Usability: 
Good
Based on 22 expert reviews.
Usability : Good
68% Positive68% Positive