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