The problem with them is
No Patent = no quality control and no comeback if you get a bad pair
So it's a bit like a lottery you might get a pair that last a while or you might get a pair that are useless out of the box and have wasted your money
Then again you might get a pair that fail at a critical point
and that could hurt
With Pro jumps you get a warranty that means something
As for 7's I am a little biased everyone that has them seems to like them
And I must admit when I took my 7 leagues back after a week I got a refund as they were unsuitable for me (I could bottom the Xrex's at will)
But I believe Clive is still awaiting an answer on a Warranty problem on his but that could be just one dealer or it could be settled by now but it wasn't the fastest of services with a lot of unanswered calls
Jason