I did this one, and it was my 5th WOD for the week. I was a bit tired and it was during lunch at mid-city gym. It was totally Rx sinec they have a real 20" box, and a good 10 lb bumper plates so it was more legit. Also of course they have KBs. I estimated it to be 20 kg, but not positive... it could have been heavier, but confident it was at least 20.
Good WOD. I got a few less than 7 complete rounds in 7 minutes. I finished off the 7th round in a few seconds past 7 mintues.
I would say I probably got about 144.
I still think I can do more than 7 now. I was tired and not overly intense and almost got 7. It's a good WOD.

Last time I did this WOD: 4/21/13 I got 126 reps.
7 Min AMRAP 7 PP 75 lbs, 7 KB swings 44 lbs, 7 Burrpee Box Jumps 20"
I completed 6 complete rounds in 7 minutes.
This was fun, and I was pretty good at the burpee box jumps which I was thinking would really tax me. I did the box jumps laterally and it wasn't too bad.
The KB swings were really easy actually.
The PPs got a little tiring actually.