I like my 4200 dash, don't consider the GS dash an upgrade at all.
Did a 100 mile Rally for charity on Sunday, and found the trip and nav very useful, infact essential! My navigator could reset the trip computer after ever turn, then flip to the nav screen which displayed on the bottom what road name we where on.
We got back first after 3 hours, even though we where in the middle of the 40 cars doing it.
At the start we where actually following a very nice 3200, don't know if he is on here was hoping to see him at the end. Unfortunately he missed a turn infront of us, then we heard he broke down and had to be recovered home.