The Hardware & Firmware quality if this product is totally unacceptable. You pay that much, and you got a unreliable product.
Honestly, I don't know how the Garmin Software developers managed to keep their job so far!
The grade information is a total joke: Totally unreliable.
My recommendation to a friend who is in the market for a new toy: DO NOT BUY THIS PIECE OF COVFEFE
From a very unsatisfied customer.