Flies great. I've flown lots of stuff, and I find the Symmetry to be the best. It's only bad charateristic is tumbling. It's pretty big for a .46 power fun fly and therfore not the best at tumbling. But it does everything else so well that I don't care. If I get the urge to tumble a lot I'll grab one of my shorter coupled profiles.
Knife edge is dead solid.
You can fly it knife edge from one end of the field to the other with your right hand off the Transmitter.

basmntdweller,
For my foamie electric I'm thinking about using the outline of a Yak fuse, but omitting the bottom part and mirror imaging the top profile line for the bottom. And then stretching the canopy area forward.
I guess one thing to consider is not making the fuse height to large, because of it's tendency to add roll stability to the design.

Bill