I've never flown a Prop powered twin, but I have built and flown an F-4 Phantom with twin ducted fans and a Kyosho LearJet with twin EDFs.

The Lear probably doesn't really count as flying a twin, because the motors were wire together through one controller and battery. So they always ran together with almost no chance you would have an engine out.

The F-4 Phantom, on the other hand, with ducted fan motors in it was subject to engine outs and in fact that is what caused the demise of mine. There are no assymetrical thrust issues when you lose one motor, but you still need to do everything right. I lost one engine when I throttle up to go around after botching an approach. I thought I did everything I could to save it, but the video of the crash, showed that I made several mistakes. Number one was that I was landing the plane to begin with, because one motor sounded a little sour. I should have gone ahead and landed it hot and let it run off the end of the runway instead of attempting to go around. Number two was that I made my turn away from the runway too quick, before I had built up enough airspeed. The F-4 bleeds off a lot of speed in turns. And finally number three was that I pulled the nose up in the turn, causing it to lose even more speed. And that was the end of that.

So for now, I'll just keep dreaming about my twin turbine powered wish list.