Sorry I didn't see your answer earlier. Yes, I've done all the courses in the specialization. I've just started the capstone project. I really liked it compared to other online courses because you have to apply the stuff you learn in a production of some sort every week (interview users, draw storyboards, create wireframes, do some testing, heuristics evaluation, even some R statistics analysis). It's not just multiple choices questions or rewording of the course content. So it's more demanding and time-consuming, but definitely worth it in my opinion.