I've not flown an M-Quad myself, but I've heard people commenting on it being rather twitchy.
Just a thought, but have you considered a QuadFun for your 6 yo daughter (sold in the UK by Manfred Kluge / EMKAY)? I've got one of those. It's easy to fly, has pretty good control if what you want is flying up and down, back and forth, spin, dive-stop, etc, doesn't pull at all, is virtually indestructible and is not expensive (£37.50). I've given it to people who've never flown a quad before, and they 'get it' very quickly with this kite. And it's a fun wee kite to fool around with, you can let it roll over the ground, take off again, etc.