Unusable with Navigatrix
357470
I bought this to use with the program Navigatrix for sailors out cruising. I was not ready to use it when I first received it, just knew I was going to need a usb GPS. This week I got the Navigatrix program in my computer all set up and this Garmin 18x is the only usb GPS that will not communicate with the Navigatrix software. I wasted two days trying to get it to work with code and it's useless. Now I find that since I didn't try to use it immediately it's unreturnable.
1265281
Buyer beware:  for the iPhone 6s, the metal casing blocks the GPS signal. I was unable to use Apple Maps or Google Maps to navigate around San Francisco and it was incredibly frustrating. Sent it back for a refund.
4230319
Navigation or camera didn't work.....I wasted some money could've saved $40 without these extras.
3063673
Bought this for my Magellan GPS. I hate it. I still use it while I wait to buy a new one. With out this traffic kit the GPS unit send you on some stupid routes, some times they are just crazy. This kit just adds to it confusion in calculating the routes. I use it just to see the traffic details, they are not even accurate.

If you use it to automatically route based on traffic details you will be taking stupid routes, maybe even go around in circles.

There are better options. I would get lost less just using the maps in rental cars.
3074815
Very cumbersome to update old Garmin Street Pilot C340. The old unit can't be updated per the standard update page. Need to do a time consuming work around.)
 Call me cynical, but this seems to be Garmin's way of forcing you to upgrade to a new device.
So they have my $ for the nuMaps and still had to get a new device, since I can't be bothered to spend hours on the phone to hassle with the work around.
So I paid once for "lifetime" nuMaps, and then again for a Nuvi..thank you Garmin. They should post a notice that if you have certain models, you are going to have a problem updating them with this offer.
4421187
Garmin GPS has nothing to worry about, installing the AVIC-U260 unit was painless using it was a nightmare software is very erratic try to get in touch with someone regarding this problem I'm still waiting for any feedback even though I like my AVH-7500 this add-on "AVIC- 260" was a great disappointment this was my initial reason for installing the AVH-7500 well a las you live and learn. going back to Garmin for GPS needs.
2077864
this unit responses so slow if you drive to wrong way after couple times update. the lifetime traffic is a lie, you will have to buy additional accessaries. my iphone works much much greater than this Garmin
2360772
While it functioned  on my Nuvi the usability was terrible. There is a $10 app from Navionics for my S3 that smoked this chip. It was quicker more accurate and easier to read. If you have no other option it is better than nothing. I would invest a smart phone and avionics mapping sw.
4338240
Navigation was very good but I ran into several shortcomings.

The mounting system on back is horrible, you have to line up a notch on the bottom of a shallow circle and then swing it upward and snap in the top... it's impossible to do with one hand if the unit is mounted low on the windshield near the dashboard, you have to pull over to attach it to the suction mount that's already attached to your windshield.

Lots of screen glare, my old Garmin Nuvi 365WT has a glare resistant screen, this one was a big step backward.

Voice recognition is lousy, it gets some stuff correct but many commands are absurdly misinterpreted.

Battery only lasted 15-25 min from full charge.  I bought new, not refurbished... yet mine came with a complimentary dog hair in the box (no pets in my home of 18+ years).  Obviously someone else's return due to the defective battery.  Returned for refund once I discovered the battery was no good.
3852146
The Garmin City Navigator Europe NT maps worked fine on some older Nuvi models but not on my Garmin Nuvi 2599LMTHD North America. I wish I had bought the Garmin Nuvi 2559LMT North America and Europe instead.
1409424
A bit hard to navigate (esp w/walkaround feature). They have the user manual for download... but you have to buy it. Hmm... I'm considering if it's worth paying for $$ Poor navagation panels & icons.
29674
Could not get this unit to work properly. could not select functions from main menu to enter waypoints for navigating to. . I am in the process of returning unit for refund.
3355612
I purchased a N5800 Nav Edition phone and it has been almost a total disappointment in the Navigation department.  It is not easy to use and there is NO manual in the box.  When you go to the website they list about 10 different manuals for phones but there is no way to determine which manual you need.  I have contacted Nokia customer service 3 times now and so far all they have done is promise some one would call me and tell me how great their cutstomer service is.  Well it has now been about 6 weeks and I have still not had a call back from them.  After much struggling I was able to get it to navigate a route for me a couple of times.  However, the second time I got it to work I made the left turn it told me to make and the display showed me heading in the right direction.  Then it went into total lockup mode and I had to turn the phone off.  As a phone it is okay but there are hundreds of okay phones out there.  As a navigation device it is almost worthless.  If you can find the owners manual and all it might be okay.  However a lockup in the middle of navigating doesn't inspire much confidence.  Fortunately I rarely need it and I can read a map combined with Anchorage, Alaska is not that big of a city.  Good luck if you do buy one for the navigation feature.
4022949
After buying this TomTom to travel in Europe, I'm going back to Garmin. You can't just display a map without also entering a route - extremely inconvenient for touristic sight-seers! Definitely not for tourists, at least.
2112867
I purchased Streets and Trips to use with a Windows Mobile 5 PDA and Bluetooth GPS reciever.  As I was looking around at various gps software and maps, I decided on Streets and Trips intending to use Pocket Streets even without the ability to give turn by turn routing due to some reviews of Street Atlas claiming the maps were often inaccurate causing mistakes in it's routing.

I was quite shocked when I installed Streets and trips 2007 and found it no longer included Pocket Streets.

If you are not using a laptop, pass on this.
688484
Compared with Navionics chips, I found these maps falling short of detail, including navigation details and depth contours.  Likewise, no updates are planned for these maps.  Other options might be preferable
1778312
Shortly after this was purchased and before installation, our car was broadsided and took over a month for it to be repaired. I just installed the SGGCX2 (2018) but cannot get the GPS to work correctly. The speed takes up to a minute or more to update and it does not follow on the map using Dashcam. Unfortunately, my 30-day return window is closed now. I have a 2-3 year-old Panorama that works flawlessly in the same car that was much less expensive than this unit. I have sent an email to the seller and if the issue is satisfactorily addressed, I will edit my review.