I have always been on the 3PK,true, the ease of configuration and setup on the 3PK is awesome BUT if I were to start off with the M11 I would be saying that too about the M11. It's a;; about the learning curve,remember,change is consistant.
I am contemplating to change my transmitter and had the priviledge to test out the M11 for a few days and found the accuracy of the M11 is superior to the 3PK. Plus the feel of the steering wheel on the M11 is much more weighted. On the 3PK I increased the steering wheel tension by dialing in the 1.5mm set screw BUT all it did was to pull the spring harder which resulted in the steering having higher tension on the initial turn unlike the M11's feel which is more consistent across the range.
FEatures on both controllers are the same except that 3PK has an in-built fail-safe which would be desired in the M11.
The M11 is more weight balanced compared to the 3PK. Just my observation of both transmitters.