I am currently going through it and I happen to be in a very neat group. Everyone is friendly and it's been a good experience so far. We all post and support one another and keep each other on target. Your mentor is there to answer questions and the lessons posted are very good.
The minimum hub requirement as part of the program is 8 per month and you get an upfront payment for those hubs. They have to follow the guidelines and you have to pay attention to titles. It is a time investment, but so far I am finding it to be worth the effort.
I like the support and feedback. I was not new to internet writing when I took this on and I feel I am still learning valuable things so in my mind, it's worth it. I had my concerns too at first. I have a very busy writing schedule but I fit it in. It's something I am doing for myself and I am also building a network and a stronger image/brand for myself.