Willi,
I think that Steve makes and sells a very good kit.
I have had some very good flights, and some bad ones.
It has to be hand launched and done right. Rotor speed has to be right.
It would be good if someone in your area has some Gyro experience to help you set it up and help you fly it.
I did get tired of rebuilding mind and one of my neighbors took mind out of the trash a few weeks ago.
I would say go over all the setup and get it right before attemping to fly. Hang angle, head tilt, etc. Steve T. had me put in alot of left Rudder and head tilt in the first attempt to fly mind. I threw it up in a too high angle of attach and it came down in a hurry.
Good luck and keep us posted.
Jim