This was definitly a good place to sail! I started at Bad Hoophuizen with Joerg and Erik, but soon I did a short visit at Hans Kleingeld, we tryed each other gear and I returned. Back at Bad Hoophuizen Joerg and I tested some things, after this I returned to Hierden and did there again some runs. At one point most windsurfers at Hierden stopped windsurfing and I went upwind for quite a long time :)
Anyway the iSonic 107 is a very good board to bring you at every corner of the lake.