With 2.1 meters mat to pull 75 kg ... that it creates no problems. The mat is delivered as described and it is clear after 3 minutes start. I have the mat fixed to the ground with a few small stones, designed the linen and even short and pulled the mat from went like the devil. The information in the little booklet that this was exactly agree. It has been flying to the mat a certain window in which the mat is called 100% ... the pilot course. Outside of this window is flying the mat rather leisurely. As I said in this window is correct going on. Control movements by pulling on the lines to be implemented immediately. Sometimes so quickly that overlap and twist the ropes. But that's as far as no problem if you quietly controls in the opposite direction and the ropes so again untwisted back. What you should not neglect ... Only fly in the open fields ... any person below the mat ... no cars underneath the mat. If the mat pops times under full-speed on the floor one can imagine that you can order a person causing serious injury. Also, a hood or a car roof could easily get a bump. If you have the steering mat with the ropes in hand, you can hardly imagine that a such a risk can be assumed. Taking into the safety instructions given in the description then nothing should happen. The fly makes a hell of fun and "long arms": o) Clear recommendation and 5 stars from me.