I haven't had an issue with the CG. I did experience one where the plane took off straight up and stalled and did a sharp left into the ground but for me it was a pilot error. I pulled back on the elevator too much and stalling the plane vs just letting the plane take off by itself.
I really want to take the plane out but it's a bit too windy. i also want to test it out with it's new 2.4Ghz Tx/Rx cause I did have a bit of interference issues when I last flew it so this is more of an kind of insurance