I Purchased the Navman 3420 for the iPAQ after becoming extremely dissatisfied with the Pharos Ostia GPS product. See my review of that product. Like the Pharos system the routing software wants to choose you route for you and may not always be the best or most practical way to go. If you want to stick to the interstates, you can't if it thinks another way is shorter. This is also a flaw in the Pharos system, but the Pharos is much worse. Also it does not offer the flexibility to get from point A to point C via point B. But that is the worst thing I have to say about this product. Overall the maps are pretty good and fairly detailed. I have found a few quirks like a missing road segment or bridge which causes the system to route you the long way around as well as a few landmarks that are not in the right place, but the re-routing capability is pretty good. The maps are fairly good size, probably averaging 50mb and will require a CF card. A 256mb card will do and hold 4 or 5 maps, but I would recommend a 512.br brFrom the hardware point of view, the Navman 3420's GPS antenna sleeve fits the iPAQ like a glove and has an integrated compact flash slot and is still compact enough to fit in a jacket pocket. Also the suction cup windshield mount fits right into the back of the sleeve allowing the unit to be mounted conveniently to the driver.pThe functionality is pretty good and the menus are clear and easy to navigate. Most of the menu items are large enough to be selected with a finger and the zoom and toggle toggles are controlled with the action button. There have only been a few times that the software has gotten `confused' and required a reboot (vs. frequently with the Pharos). You should be up and running right out of the box in the time it takes to load the maps.pI have not had the occasion to use Navman's tech support, which in itself is a plus, so I cannot comment. I'm not going to go so far as to say it's the perfect product but it's design and operation is practical and sensible. The manufacturer has obviously put some thought into the product. I would like to see further development of the mapping software and more flexibility in route planning, like via waypoints.pSummary: Overall I'm pleased with this product. Hardware - 5 stars, Software - 3 stars.

I bought the Pharos GPS last year and enjoyed the technology, but after purchasing the Navman and using it for one day, I'm already a big fan. I had problems with the cable that plugged into my Ipaq for the pharos. This cable not only supplied power, but it also connected to the GPS device mounted on the dash (there is also a wireless unit available). The cable would fall out and was eventually stripped and useless. I contacted Pharos, but recieved no reply. I purchased a replacement cable...but after a couple of months it came to the same end. The maps are old on the Pharos and my house which is five years old does not show up. The Pharos system also chooses strange routes at times to my various destinations. The Navman's graphics are exceptional. Very crisp. And every street I drove on toda(including my own) is present. Icons can be toggled to appear for restaurants, banks, gas stations, etc. The AI for route choosing is excellent, not to mention additional features that show speed, estimated time of arrival, distance to destination, screen colors to improve viewability during night/daytime (this is important) etc. Flashy user interface. Better voice-over for voice instructions, with improved commands. You can also move the map around without 'unenabling' the GPS. Just click on the icon for your car again to center on the vehicle. The suction cup bracket that connects to the window is absolutely outstanding and included at no extra cost. Your GPS will be floating over the dash aimed at the angle of your choosing as if it was installed at the factory. There is also a CF slot (which I put in a 128mb card). The interface for installing maps is also greatly improved. Even if you pay [$$] more for Navman (which you may or may not) you'll probably save that in replacement parts for Pharos, but the usefulness and added features are worth much more. Truly and outstanding product!

I was running the NAVMAN GPS on a iPAQ 3955. To make this short, after doing a "Hard" reset and applying the latest Soft-Paq I could get it to work 1 out of 10 times.p Another mistake I made was buying a SanDisk 512mb CF card so I could store the program and maps (You'll get about 1/4 of the US on the card.) You can't install the program to the CF card as it will not function and the program (4.3mb installed) definitely slowed down my machine.p Just so you know I sent it back to Amazon and was refunded.

I was running the NAVMAN GPS on a iPAQ 3955. To make this short, after doing a "Hard" reset and applying the latest Soft-Paq I could get it to work 1 out of 10 times. Another mistake I made was buying a SanDisk 512mb CF card so I could store the program and maps (You'll get about 1/4 of the US on the card.) You can't install the program to the CF card as it will not function and the program (4.3mb installed) definitely slowed down my machine. Just so you know I sent it back to Amazon and was refunded.

I was running the NAVMAN GPS on a iPAQ 3955. To make this short, after doing a "Hard" reset and applying the latest Soft-Paq I could get it to work 1 out of 10 times. Another mistake I made was buying a SanDisk 512mb CF card so I could store the program and maps (You'll get about 1/4 of the US on the card.) You can't install the program to the CF card as it will not function and the program (4.3mb installed) definitely slowed down my machine. Just so you know I sent it back to Amazon and was refunded.