If you're still reading comments :-) I remembered a few other things Les Mills does that are great.
They have a lot of training videos, several for each class of exercise they do. They're in-depth, and really show you the form.
They add tips to the actual work-outs, so you're constantly reminded of good form.
They have alternatives to most of the exercises, so you can modify them if you have (e.g.) knee problems, or aren't up to full push-ups, etc.
They do good cool-down routines at the end of most videos, and have a number of cool-down-only videos you can watch for the others. Not everyone thinks highly of post work-out cool-down/stretching, but a lot of the people who seriously study exercise recommend it.
They have a lot of training videos, several for each class of exercise they do. They're in-depth, and really show you the form.
They add tips to the actual work-outs, so you're constantly reminded of good form.
They have alternatives to most of the exercises, so you can modify them if you have (e.g.) knee problems, or aren't up to full push-ups, etc.
They do good cool-down routines at the end of most videos, and have a number of cool-down-only videos you can watch for the others. Not everyone thinks highly of post work-out cool-down/stretching, but a lot of the people who seriously study exercise recommend it.