Personally not for beginners and half the exercises are too advanced to do.
It works. I don't like it, but it's more a me thing, the app gets more difficult as you go and I think it makes some unrealistic jumps on difficulty. Slow the progression and add options better for switching out excercises. I have back injuries and some of these can be rather strenuous on those injuries. Also balance is assumed in this app. I can't balance but these exercises will have you wobbling around trying. Personally not for beginners and half the exercises are too advanced to do.