I feel JumpSport 350i is still softer and bouncier than Maximus.

on JumpSport 350i I actually have a bit of that "happy" free flying sensation, which I didn't get on Maximus....   Maybe it is the "spent more dollars' senstation .     

As one article stated, softness not necessarily translate to effectiveness regarding "health bounce", or "lymph bounce".   I believe the Maximus is an excellent piece of equipment as well.  Definitely more durable than the Boungee band JumpSport.  I like the soft and happy bounces on JumpSport more.  Let's see how well the boungee bands will hold up.