I'll second this. I've been a subscriber for a couple years now. What I like specifically is that they allow you to select a context ("Focus", "Relax", "Sleep",

I'll second this. I've been a subscriber for a couple years now. What I like specifically is that they allow you to select a context ("Focus", "Relax", "Sleep", or "Meditate") each with several sub-contexts (e.g. "Focus" has "Deep Work", "Creative Flow", "Study & Read", or "Light Work"). It has helped me overcome a lot of distraction in order to get me started on work and keeping me focused once I've gotten started. It's worth the money, in my opinion.