I used to own/fly a Monnet Moni with a V-tail. It was perfectly controllable in both pitch and yaw from my point of view, but the previous owner, after my first takeoff (it was a single seater) expressed surprise that I kept it stable in pitch whereas previous pilots had found it unstable (he'd watched me climbing out without any obvious PIO).
I never found any problem in pitch or yaw all the times I flew it, but when opening the ventral airbrake, there was a noticeable nose down pitching moment due to the change of centre of pressure which was easily trimmed out. The controls were so light anyway it didn't matter if you didn't re-trim.
When turning I found it no different from 'normal' aircraft, just a small amount of 'rudder' to counteract the adverse yaw from the full span ailerons.