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. Magellan RoadMate 1424, Magellan RoadMate 1210, Magellan RoadMate 1700, Magellan Maestro 4700, Magellan RoadMate 1340, Magellan RoadMate 1475T