Reviews

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Garmin GPSMAP 66 sr is (a little) clumsy and slow to use, when nowadays you're used to the fast zooming of touchscreens, etc. For some reason, it has been easier to plan the route in advance with Trailmap and transfer the finished route from there to Garmin. Otherwise, the positioning quality is quite good and locates quite well in the right corner of the home when starting up. The durability of the battery is quite good, although I didn't get to test its longer durability after my one-week hike was cancelled.

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Good GPS. The battery lasts a relatively long time on a single charge.

There is no doubt how good is the multi-band GPS chip. I've contacted Garmin about the WAAS/EGNOS feature advertised in the user manual, they replied: "After doing some digging we have found that the 66sr does not utilize WAAS/EGNOS. This is due to the multi-band technology. We will put in a suggestion that they add a note in the manual. We apologize for any inconvenience this has cause." I also own the Garmin GPSMAP 64sc for years and I found very few improvements in the last years. The 66sr screen is better, the buttons are better, but the embedded software is still rather slow, the UI/UX has not improved. Also, there is a "feature" that is a "bug" for me: the low temperature locker. The 66sr turns off below -20degC even if the Lithium battery can technically work under -20degC. When I was skiing at -26degC, my 66sr was "dead" but my old 64sc with its NiMH battery was working well.

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Sturdy-looking device, the logic of use is learned quickly.

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Excellent product. To quickly find connections, accuracy is compelling. Guaranteed Garmin quality.