Easy to use, Very affordable, Easy to install, nice interface

Nav discs are EXPENSIVE there's no way I would pay $150 a piece for them, I bought the whole set from this guy for $70 shipped. If anyones interested his email is mssokc@satx.rr.com

Great nav system, a bit older but it still works fine. Gotta love ebay.

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pioneer avic d1 (buddy's deck)

Quick calculation, decent database

Price of map discs. $150 a piece is just ridiculous. I found the discs pretty cheap. If you need any of the map discs, feel free to email me at StephenDavis@satx.rr.com

This is a killer nav unit for the price. It's not quite as fast and has as detailed of maps as the current DVD units, but still gets me everywhere I need to go.

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Clarion AutoPC, Kenwood KVA-2100

-Easy to use
-Can enter even a phone number to obtain address.
-Can even be used as a phone book. Simply type in the business name and the information is built into the CD rom. Saves me $$$ no more 411 calls!
-voice directed turns

-kinda slow. Sometimes you can pass your turn before it recalculates a new route.
-bad color scheme for highlighted selection. Sometimes I can't tell which item is selected.

I can't see an average person needing this. However for someone like a real estate broker. This is absolutely a MUST! Saves me sooo much time looking at maps. It will pay for itself in no time at all.

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Factory nav for Acura

Quick navigation compared to PC based units, retracts into dash when not in
use (which is almost never), three years reliability in a heavy truck and high vibration.

High cost ($150) of the nine regional CD-ROM's, the promised updates have not been done, have to change a CD when crossing regional borders

We have the Alpine NVA-N751A installed as part of a complete electronics
package in the cab of our over-the-road RV. We find it to be extremely
accurate and use it routinely to find addresses around the country. The
choices of fastest route, avoid toll roads and freeways, and last route
or address features make it quick and convenient to use even when we are
going to a destination we know fairly well. We often locate a rest stop or
intersection as a destination just so we see in advance what the highway
ramps and interchange directions are going to be.
Perhaps a bit pricey for average use but a lifesaver for over the road folks like us. I wish the DVD version had been available when we bought ours. I would not by the CD-ROM version again but would definately replace the unit with the newer Alpine DVD unit (for only one disk) even though it is about $500 more expensive. By the way, our price estimate is from memory
and we had a lot of other stuff installed in the truck at the time. Our Alpine installation drives two monitors, one for the passenger, and also controls the CD player and the big Macintosh amplifier.

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We use PC based nav from DeLorme and TravRoute. Only thing the Alpine really lacks is good long distance planning so we use the PC's.