This spot is located on the North Sea, but is still a separate lake. The only bigger city around is Groningen, so usually this spot is not so crowded. There is not much infrastructure at the Lauwersmeer, but a free parking spot right next to the water, where you can comfortably rig your gear. You enter the water by going through a little indent through the reed that covers most of the shore.
The water level changes a bit, but the lake is pretty deep for a dutch water, so even bigger fins are no problem here. The wind is always quite strong here, especially with SW-W winds. The only place with stronger winds then is the Den Helder area, but usually the difference is not more than 1 bft. Depending on the wind direction the Lauwersmeer can be quite choppy to really flat with westerly winds at the east-shore. Southerly winds make for the most choppy waters with the waves having the longest build-up. Down below I put in a little map where you can see my best peakspeeds with different wind directions
As you can see the Lauwersmeer is pretty fast with the right wind direction. With W-WSW winds the spot offers a great speedstrip. The wind is only covered by some reed then, and with the spot being right at the sea the wind is not so gusty here. If the wind blows from the south, there is some flatter water behind a mole in front of the little island you can see on the map. The sweetspot is very short here however and once the mole ends the water is still flat but also really shallow. With the changing waterlevel you have to see how far you can go into the flatter water, so it is important to be careful here.
With 39,08 knots peakspeed, the Lauwersmeer is my third fastest spot behind La Franqui and Strand Horst. I did just visit this spot in november 2015 for the first time, but since then already came back twice. If you’re into speed or Slalom I recommend to check out this spot.