I have used the Radian to teach my son to fly RC. After I trimmed it out and got it to altitude I handed him the transmitter and he did fine, he gave it back to me for the landing and on the second flight he flew it from lanch to landing.
While the Radian is not what I would call exciting plane to fly, it is graceful, forgiving and relaxing.
Just my opinion but I find it's a great place to start.
RickC2