That topic regularly came up on /r/meditation. The consensus was usually that it’s not worth it. You will learn a meditation style, yes, but it’s not better or worse than others, and you will also buy into a cult. So at best it’s an overpriced experience.
If you want to learn meditation, there are sooo many resources online and in books. Why not use one of those?
And even if you want to it retreat style, there’s free courses by dhamma.org all over the world.