I've liked them. I'm not a pro, just primarily a swing trader. Been at it a couple of years. I've learned a lot using their graphs. I wish they had more documentation though - I have to write support for elaborations on things - e.g., one place they will show Volatility, another they will show Implied Volatility, so I'm not sure if they are both referring to IV or one is IV and the other is Historic Vol.
They post the Wednesday interactions with Tom, which I used to enjoy reading in the evenings, but now Tom's audio, so reading the PDF you only see what people are asking, and you have to listen to the whole audio to find the response; it used to be a lot better when you could just scan the PDF for the question and answers.
But these are just 'nitpickings' - I like using them.
My only other experience with options had been on Fidelity's system; I like TOS better.