well, it's also a bit snooty to basically say it looks like a chore and not worth your time. Sounds like the super gnar skiers who look down on skiing groomers or any traditional "techinique" skiing, and who stay home apparently doing better things except for the opening 2hours on perfect untracked powder days or their trips to go heliskiing in chamonix.
If you take that opinion, that same question would come up on why have people here bought the pretty expensive skier's edge trainer? You could call that thing an even more boring "chore", yet people have shelled out $1000s for it. So the same reasons why people bought that device apply to this.
here's some things I think are cool:
1) perfectly consistent surface to perfect your technique, or to learn for the beginners
2) goes on forever or as long as you want it to. Sometimes a run ends too soon and/or a ski day can be spent more on a lift then on the run. Especially on a frozen over groomer day.
3) no crowds to avoid to mess up your rhythmn, can just focus on technique not having to avoid others.
4) perhaps closer to you then the slopes, and less time investment.
5) some people love working on technique, and the feeling of linking turns perfectly. So despite a reduced difficulty factor, they like to obsessively) work to get an easier thing perfect. It's not a chore to them. Perhaps you more enjoy skiing to applying ski skills perhaps in a less-perfect way but conquering more difficult, unique, and/or varied terrain. Link goes here to the "why do you ski" thread.
6) alternate workout than going to the gym and running in place on a treadmill or pedalling a bike going nowhere, or lifting pieces of metal up and then back down, which arguably are even more "chore" like.
Perhaps cons would be
a) likely expensive, and you don't get as much solo "time" as they show in the video.
b) boring after a bit, but it's not like you're stuck there all day.
c) not better than skiing if it's winter and the slopes are open.
Edited by raytseng - 9/12/14 at 11:48pm