Here an article just posted on The Brick Fan is reporting many are saying these new 'Super Jumper' pieces are dangerous to your coveted minifigures potentially causing damage to the character's legs from dents to cracking. The culprit may be how the translucent plastic of the piece sticks a little too well in the minifigure's leggings or perhaps people are applying too much pressure when attaching the two together. Whatever the reason this seemed important to make note of for those of you looking forward in building this year's Super Heroes sets that includes the item in question.

I just watched Jangbricks' review of the Hulkbuster and he mentioned it too.  Perhaps the best way to avoid problem is to put 2 cylinder pieces on the jumper and put your minifig on top of them (just like how Ironman fig is placed on the jumper)

Or even the 1x1 round pieces, I think the super jumper is cool.

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I put an old mini fig on the super jumper never again had to use the orange divider tool to get it off. Don't use your mini figs it will break there legs lol