I'm not a novice with GPS units, have 2 other Garman products. My requ
irement was to find a GPS map navigator with a big screen, and the capability for an external antenna. This unit for my wife's car works great. It has a super sensitive receiver to pick up GPS satellites, and acquires all signals only after a few minutes when after installed and turned on. I probably do not need the external antenna for everyday use, unless you want to mount the unit inside the car away from the windows. The touch screen is self evident to use. So far, I'm very pleased. The map library seems sufficient, so far, and I'll be able to download maps of Ireland, Sweden and Europe, when I go there.
Hank in Silver Spring, MD.

This has completely changed how we travel. As an example, my wife and I were moving and we had one weekend to find a rental. We visited 13 rentals in two days across three different, completely unfamiliar towns...and we were completely aware of where we were and where we were going the whole time. Our move from AZ to PA was also a lot easier with this device. Voice speaking of street names is essential.

Two cons. Occasionally, for no apparent reason, it sometimes takes a long while to find satellites. We're talking 3-10 minutes. Second, the point of interest database in Altoona, PA, is for whatever reason woefully out of date and inaccurate.

I own a "remanufactured" 660 and a "refurbished" 650. The refurbished unit came in a generic looking box but both units looked mint. Both are excellent at the core business of giving directions - nice wide screen, text to speech, etc. Both units qualified for a free update to the 2009 city maps when registered with [...].

The 660 has an FM transmitter so you can listen to the MP3's over your car stereo, an FM traffic receiver that works for 30 days before the free trial runs out, and bluetooth phone integration. The FM transmitter and bluetooth are great, the FM traffic was ALWAYS wrong and so frustrating that I would have disabled it anyway.

The 650 was, for me, $[...] cheaper. So make your own call. For the price savings I recommend the reman/refurb units without reservation.

Excellent product.Snags sat fast. 3D with color is very easy to read 'on the fly'. Spoken directions in perfect time to execute turns/etc. Very fast at recalculation. Very complete, plug and go. Comes with charger/pwr cord, computer cord, and bracket/mount. Amazing amount of tech in small pkg. The Nuvi 650 is 4.3 wide...best option...much more screen space. Lots of 'BANG for the buck' @ $249.95 (on sale from $799 or so). User friendly and very easy to get comfortable with. Plug in and drive around for an hour trying to outfox it.....hehe....won't happen. Best value for price item I have bought for years. Much easier to use than conventional GPS. Now if we could just get a Marine version with the same usability for a reasonable price.

I fell in love with this product when i bought it for my-self a couple months ago. This time i bought it for my brother, as a gift. He really loves it. The best things i can quote about this product are:
1. It says out loud the street names, which makes driving easier.
2. Shows local resturants and other stores, highly useful if you are in a new place.