The coaching styles at Windells are different than at COC, or maybe some other camps on whistler.  The coaches arent as big of names at Windells, but they are still pretty good coaches.  The coaches over at whistler are all of the big name skiers, so that gets more attention than Windells.  Also, at Windells the coaching is a lot more laid back, and basically every coach is your coach.  The coaches are just skiing around in different parts of the park having a good time, so you can ask any of them for help.  The coaching at COC, and some of the other whistler camps is more in groups where you have a specific coach.  Also, Windells has the best park ive seen by far (including the whistler camps), it feels bigger than the others, has tons of variety, and if you got bored you can go to the public park, where as the public park at whistler is always packed.