Sonparc, I once have spoken with a lad who had it on the pond. The kit itself is pretty good value for your money, but it is hard to get her appearance in speed close to the origin. Though you either have a short time to sail (if you go full ahead to catch up the appearance of the orgin) or you might be even a bit slower. The relation between total weight and power is very small. Though absolutely lightweight-modeling is a must.
Definately no kit for a beginner.
Hope this was out of any help,
Jörg