I have replaced this seatpost to a conventional suspension seatpost. This one with the parallelogram is not just a looker, she does her work well. First, one must of course on his personal body weight set (see enclosed instructions). After that you can start. I am to this day driven about 100km so. Depth irregularities will try best to compensate for the rest. But light waves are attenuated. If you touch even when driving with one hand the parallelogram, you realize how it works. So I am happy. Now it is currently waiting outside about 2-3 degrees cold. Let's see how it looks with the function when it is warmer, or is even colder. Otherwise top. A few pictures I have uploaded.