Hi Jan
I don't think you would regret buying one. For the money I was expecting something 'cheap' but we found the kit to be of very good quality and an excellent buy for the money. It was a pleasure to build.
The instructions were not in English but the drawing and assembly diagram are very clear and so there is no real need for a set of written instructions.
The included propshaft, coupling, propeller and rudder are of good quality and look like they will stand the test of time.