Customer Rating: 
Summary: good!
Comment: very fast, no problem (and better:a map offered!)
Customer Rating: 
Summary: Great service saved the day
Comment: I have had two problems with this card that may or may not affect others. I had an old version of Mapsource that did not recognize the 64MB cards. A call to customer service pointed me to a free update. I had difficulty with the card in my unit. The unit was acting very flaky. A call to Garmin customer service resulted in getting a in Warranty repair for an old unit. Some specific older units (the StreetPilot Colormap) do not properly handle cards with greater than 16MB capacities. Why didn't I rate 5 stars? It take 4 hours to load the card over a serial link. The USB programmer is a bit pricy but would really make life much easier. I think for my needs I can get by without it. If you need program the card often you will want it for sure.
Customer Rating:
Summary: The Jury is still out
Comment: I have an older streetpilot colormap. In order to be compatable with this card you have to make sure that you have updated firmware (just download it from Garmin), and a current copy of mapsource. Upgrades are available on Garmin's web site(mine was way old).
It turns out that you can load more than 8 metroguide maps. You can have as many maps as space allows. Since they aren't all 8MB this is a real plus. My unit limits you to 50 maps, but you can get a lot of Roads and Recreation maps in since they vary from 64k to 400K. Garmin has very good phone support.I am having issues with my card though. Depending on where I am in the map set the unit will hang and sometimes shut off while navigating a route. I might just have a defective card. I will find out how Amazon handles these issues soon.
Oh yes downloading nearly 64MB takes nearly four hours. The USB interface is looking very attractive (even if it is expensive).
