I flew a co-axial once, and was not-impressed at all, I was very easy to control, even the Havoc was a little touchier to control than my co-worker's, with the Walkera Palm co-axial. The RotoFly takes some getting used to, tail control can be tough to get used too. But after you master it, learning the rest is not as bad (cyclic control).
I mostly used my RotoFly indoors (warehouse space) at work, I did manage to get it outdoors twice, once in a no-wind condition (no problem). Second time there was a light-breeze (2-5 mph), the little heli's cyclic doesn't react quick enough to fight breezes (landed upside-down in a privet hedge), so rollovers are a problem with breeze, only broke the see-saw & a tail blade $10 bucks in parts.

Shadow