Ski conditioning 20-min workout with kettle bells, TRX

This is an example of an intense 20 min workout.  Not sure I would ever do the entire workout, which includes 3 reps for each series.  Might do 2 reps though.  More interested in the components selected.  Starts with strength work with kettle bells, then a few TRX exercises, then a leg blaster series of squats and lunges (25, 25, 25, 25).  I remember doing the leg blaster for a few weeks with the TRX with my personal trainer a couple years ago.