Tools
The main screen gives you choices of navigation, viewing the map, ending the current navigation, choosing a detour, adjusting the volume, or accessing the system tools.
The tools are on a couple of pages.
The settings are on a couple of pages below the tools page.
The "Fuel Gauge" tool is a little easier to configure on the 660, but still requires manual setting and reset at fill up in order to be useful.
Like the previous Zumos, you can choose different vehicles and voices for navigation. There are several pre-loaded on the Zumo 660. For a larger choice of vehicles, voices or other customizations go to www.garmingarage.com.
All in all this GPS is the easiest to use and offers the broadest range of configuration so far. It is a shame that Garmin has yet to incorporate the very useful XM NavWeather Nexrad radar and forecasting that is on the marine units such as the GPSMap 478, on the motorcycle specific units. For those of who travel out in the elements, real time weather radar is a welcome feature for sure. I have a 478 on my GS and have used the animated radar data to select routes behind severe weather systems.
I have read a number of complaints about the lack of an XM tuner on the Zumo 660. In my opinion Garmin's methodology for XM support has been poor. Instead of embedding the XM radio ID code in the GPS, Garmin has chosen to put it in the antenna. This results in two problems - 1) You have move your antenna from vehicle to vehicle or have a separate subscription for each antenna you use. 2) This makes the antenna bulky and expensive.
For my motorcycles I have used a separate XM radio, mounting an inexpensive radio cradle and antenna on each bike. I also have the same cradle and antenna on my cars and a home cradle. I have used the various Pioneer radios, starting with the AirWare XM2go, then the INNO and now the XMP3. My XMP3 has a 16gb micro SD card for storing a bunch of MP3 files and it has 2gb of internal memory for recording up to 100 hours of XM content. It has volume controls that are actual buttons and that are easily glove operable. The XMP3 sells for about $180, only about $30 more than a Garmin XM antenna. The XMP3 also can be used as a portable with built in satellite and terrestrial antennas. It will run for 4-8 hours on a built in battery. The only downside is that it is not waterproof, but that can be addressed with a small plastic bag. A single subscription lets me take XM with me in whatever vehicle I choose.
All screen shots used in this review were generated using the Zumo's "screenshot" mode. With this mode enabled a camera icon is presented on each page of display, allowing you to capture any screen and store it in the /garmin/screenshots folder on the device. They are captured as bitmap (.bmp) files. I converted them to JPEG for this review.
The screen shots used in this review are from actual use while on the road, further illustrating the ease of use this model offers.