We have two Garmins, a 5" - Model 2555 with LMT and a 65 - 6" with LM. There are a few mistakes in the maps but the only time we were led down a dead end street was due to the address supplied by AAA Tour Book.
We each have slightly different settings and get usually small variations in the routes.
We also use a Garmin 35 Dashcam. Best dashcam we've had. Thinking of a rear view camera with DVR for the towed. Both of the accidents in the last few years we were rear ended. Last one a couple months ago resulted in over $15,000 in repairs to the DW's 2017 Explorer Limited. It was on record at the time.