Summary: I owned this GPS for a little over four years, and it was a great device. I would give it five stars except that the touch screen recently ceased to work. Since it was a very expensive unit I considered having it repaired, but Garmin no longer supports this GPS model. Now all it amounts to is a hunk of metal ready to go to electronic recycle. I'll probably look at another brand as a replacement.
Summary: The Garmin 660 was a replacement for 650 which was stolen. The unit is a great value for the money. The touch screen is asp more responsive than newer units. If you don't want all the toys then get this unit.
Summary: I've had this model for 6 years and have no regrets. The navigation occasionally takes you by strange ways, but gets you where you need to be 99 times out of 100. The bluetooth works flawlessly and the internal speaker is adequate. I've used it with 3 different phones and never had any problems. Once you do the initial pairing, it connects to the phone automatically when the GPS powers up -- couldn't be easier to use.
Summary: I've owned this device for a couple of years now and although a bit outdated it is an excellent GPS navigator. Directions are accurate and the display is easily readable in all but direct sunlight. Some back roads may "confuse" the device at times - one amusing incident was when the "nuvi" told me to drive 6 miles and make a u-turn (I was on a jeep trail in the Colorado mountains). I've had to replace the battery once, but that was a simple process.
Summary: Your basic (discontinued) wide-screen GPS. Nice big colorful screen. Voice is clear & the bluetooth works great. Just not sure why they put them in GPSes. It has to compete with road noise and the stereo, and the speaker points at the window. Same comment about the MP3 player. Why? I guess adding more stuff sells GPSes. Garmin probably has the best mapping engine, so that's all that counts.