Not worth it. I subscribed at around $330/year off and on meaning to use the tools, but found when I made my own calculations in a spreadsheet is when I really did the learning and understanding. I ended up being charged $421 automatically two days ago, emailed back saying I didn't want to be auto enrolled and it took a lot to get it stopped and then I had a retention guy try to keep me on. Finally got the permission to stop but they only refunded part of it and when I asked, they said I checked a box saying I agreed to all their terms and conditions and that I agreed to auto renew and that after the auto renew date I would only get a partial refund. Same day refund request didn't matter. They kept $35. Shame on me. But on top of that the auto renew was over $100 more than the previous year. I didn't end up using the tools and after that answer and increase and partial refund it left a pretty bad taste in my mouth.