I'd not recommend this product unless they can change their safety mat - choose a different one that secures properly.  This one has a mat that is just tied on with elastic which ripped off almost immediately. Very flimsy.
Within 2 days the safety cover over the springs had ripped from ALL the ties and became a horrible tripping hazard. My 10 year old caught his foot on it on the way out of the enclosure and fell out from the full height of the trampoline directly onto his knee.  He injured it quite badly and couldn't walk for a few days.  
In addition, the springs are now visible with all their sharp edges which are a further hazard.
We've stopped our kids playing on it until we can resolve the situation.