II have flown hundreds of flights on a ROO, they are docile and safe at low speeds, if you have any problem landing, just set up the approach and cut the engine. They land really well without thrust, in-fact they are easier to land that way.
The only real vice the ROO has is going slow at the top of a loop or inverted, as the airspeed decays inverted the now low thrust line pushes the nose up, you will find you are applying more and more up elevator to try and pull it through the loop. Sometimes the plane slows up so much that it will flip nose over tail! and then go into an inverted spin.
This maneuver is now carried out deliberately in the UK at most shows, by applying more thrust the plane can be made to tumble continually.

If this happens you must not open the throttle! just chop the engine to tick over, the plane will fall and as the nose drops control is regained, you can now open up and go!

It is quite safe as a maneuver as long as you know what to do, but can be a bit of a shock if you are not expecting it!

Just keep the speed up inverted and there is no problem!