I have had the 1.8 and the 2.2 . I fly on a 400 ft grass field. The 1.8 crashed on first take off. I sent the video to Chief and was told I had the speed but I gave it a jerk that put it in a high speed stall .
The 2.2 I was more careful for 4 flights but the 5th the plane going down the runway started toward the fence where people were standing so I lifted it off and it did the same thing. I blame myself for not correcting faster.
Just thought a word of warning for you to think about and I have been told the same thing has happen to others. But when the 2.2 was flying it was great.