Thanks! Yeah, off the floor is the hard part for me. If I get it to the knee, the rest is easy. Maybe something to do with years of kettlebell swings...
This was after squats and bench press, so that definitely accounts for some of the grindiness of these reps. The interesting thing was that I did another set of 3 after this one (with 8 minutes rest between), and it moved faster than this set!