I just got mine today, they were really heavy and walking in them was weird. I can walk on my own mostly now (fell over within 5 minutes though, good thing I got those pads too). Still need a friend by my side in case. Normally when I walk (without projumps) my legs are quite close to each other and my knees sometimes rub. Had to learn to walk with my legs apart otherwise the knee bars catch each other and I tend to fall. Also catching the pad on the floor cos you didn't lift it high enough when stepping. Anyways, they're great. I love them so much! Already had people going 'aren't you meant to run in those' and I has to confess it was my first day.
I tried running/jogging, well going faster but it didn't work, keeping nearly falling forwards. Only my first day though. I can't jump at all in them though, but managed it holding onto the door frame with both hands and jumping on the step for a bit (you need to put a lot of force into them to jump!)
Anyways, so going to be there on the 19th!! This is going to be great!