I weigh 95kg and I must say I'm having fun with my son.
I regret, however, that the springs start to creak after a few days, but I guess that's normal, metal against metal.
If you are wondering if 2,51m is sufficient, tell you that I measure 1.90m and I find that there is quite a place to have fun, so for smaller children ... no problem.
The jumping surface is tight and your children will not go to course to the moon or beyond the net.
a good trampoline, cheap and this is important given the amount of different trampolines on the market, that adults can use (alone or with one lightweight child).
board before mounting: wear gloves, tubes are galvanized and coated with a protective fat that is damn messy.