The problem with the full flying stab is the servo has to be very strong, so it's also heavy, but this is not really a problem for most, the other thing is it has to be well set up to take the most advantage of the servo torque/resolution, as if it is not well set up, it can have some inconsistencies with centering in flight, particularly, I don't think it worth the hassle and the airplanes fly either the same or worse, I only flew the Bi-Side from a friend on F3A, but own some 3D planes with the full flying stab where it has been good for some maneuver and really bad for level flight.

Regards