Summary: The Satellite reception is poor. Sometime you have to run for a while from your starting point before you can pick up satellite signal. Also, sometimes you lost the satellite signal while driving. It bothers me and I am not happy about poor satellite reception.
Summary: After setting up for Avoidances the routing function still gets its own mind as how you should go. This unit wanted me to U turn and kept insisting on it for the first ten miles of a 20 mile direct route home from the store. When I think of using it on a long trip to a new town the thought gets real scary. Maybe their Map Provider needs to Make trip to the western states. All my Garmin units seem to have the same type of problem.
Summary: I had to return the unit because the ball-and-socket joint did not hold. The unit fell down to the floor with the slightest touch. Yes, I do know how to install the ball-and-socket joint because I also have the 2597 model and it works fine. The reason for the 7 inch screen is to support an option rear-view camera. The 7 inch screen is roughly the size of what would be provided by a navigation system sold by automobile manufacturers. Some like it, some not.
Summary: I like the size of the unit - great for older eyes but the unit died after just weeks and one hour of real use - Amazon was great and took care of the matter quickly - sent me new unit (hope this one works out better) and I sent the dead unit back using Amazon's return UPS label. I have a Garmin nuvi for my wife and it has worked without fail for over five years - so I was disapointed with the 2797LMT.
Summary: Great product with great support from Crutchfield. No support from Garmin. At time of purchase tried to register unit with Garmin through "Garmin Express" and download updates. Would not recognize unit, had to delete and re-enter. Then map updates still failed. Two attempts and three days of waiting for a response from Garmin. When they finally did respond, they were of no help. Ended up returning unit, don't need the hassle when trying to get updates.
Some Issues With Charging and some quirks in the electronics
David Williams, Amazon
2 June 2013
Summary: I bought two of these units for my wife and me, thinking that the larger screen would make it easier to see without our reading glasses - I would say that the larger screen is only marginally better and not worth the extra money. On one unit, I accidentally ran the battery down to zero a when I plugged the unit into the car charger, it would not power up, even after several hours of charging.