The twinstar has a ton of out-thrust on the engines, which really make engine-out flying with it a lot easier. It also has a pretty good rudder and doesn't have a bad stall at all, so it's about as easy to fly twin as you can find.

However, all the twinstars at my field have motors bigger than .15s in there. While the plane should fly fine on the .15's if you loose an engine, I don't think you'll have enough power to maintain level flight at all. With .30-size engines, I've seen twinstars fly around almost normally on one engine.

The advice above about tuning one engine at a time is right on. The guys who try to adjust the needle while both engins are running always seem to be the ones trying to fly on one engine.