Which edge are you getting?
I have their 33% 540T and it is very easy to do all of the 3D manuevers with. I also have an old .40 size sig fazer fun fly that will harrier but you do have to correct it more often with aileron input. The main thing the fazer won't do is a tight waterfall.

A sledge is a great .40 sized airplane that will do all of the 3D manuevers. After flying one of those I was hooked and got one to replace my fazer with.