In my opinion - GPS and every other unit has been bought because it should cover my/yours high expectations in almost every city environment. If I wanted a mountain GPS or "some" GPS I would not buy 3790T or the best Garmin at that time. Less than year later, Garmin stopped 3790 and said "Sorry Guys".
My only feeling was that I'm screwed up!
So I will do whatever possible to get us much better accuracy as possible using new software. If not - most probably I'll go back to 3790 SW because of the accuracy.
If during tests unit die - well next series are coming. I'll buy new best one. The problem here is that you never knew which unit is the best one.... Sometimes most expensive is not equal to the Best and reliable .