The Garmin Nuvi 660 is a 4.3-inch widescreen portable gps device. This
particular model feature a very nice widescreen on it making it extremely easy
to read.  Even with the widescreen, they managed to keep the unit slip you could
still take it out of your car and carry it in your pocket and take it with you.
 It has Bluetooth, text-to-speech technology, POI lookup, traffic alerts, mp3
playback, JPEG viewer, currency converters and more.  

Traffic alerts is another wonderful feature on this one.  If there's an
accident a few miles ahead, instead of you coming up on it and having to sit in
traffic for extended periods of time, this unit will actually notify you and ask
if you want it to re-route you around the incident.  How cool is that?  No more
getting stuck in traffic.  That features pays for the unit for most of us.  The
POI lookup function is very neat as well.  If you look up a hotel for example,
not only will it tell you how to get there, but it will also give you the phone
number and even dial it for you if you have a Bluetooth enabled phone paired
with it.  It will also allow you to view calls from your phone's contact list or
call log making it very easy to place hands free calls.  Receiving a call is
just as simple.  When there is an incoming call, the call id data will be
display on the gps screen.  Simply touch the screen to answer.  It's really that
simple.

It also has Garmin Lock, an anti-theft feature Garmin Garage, which allows
you to customize the look and color of the vehicle representing you on the map.
 In addition, you can also plug in an sd card obtained from Garmin containing
Garmin Travel Guides which provide additional detailed information on points of
interest and other attractions along your route.

As expected, North America maps are standard with this one and can be updated
via a USB cable connection to your computer.  You can even change the map it
uses to another continent if you need to.  Also included is a vehicle suction
cup mount, AC charger, car charger, USB cable, carrying case, getting started
guide and of course the owner's manual.

Ad far as the actual map, It features both 3D and 2D map views allowing you
to customize the look of the maps.  This unit speaks the directions clearly and
even says the exact street name it's asking you to turn onto.

Garmin
Oregon 450, Magellan
RoadMate 5045, Magellan
RoadMate 1340 , Garmin-eTrex , TomTom Car , TomTom GO
740TM, Garmin nuvi
3750, Garmin
GPSMAP 60Cx,