I started out with them. I was formerly using SPSS with a background in C and C++
Their R courses were really strong back then. Their Python courses were rather weak. Their courses, like all other courses, depend on the creator or instructor, so some courses are crap while some are really strong. I am not sure about today when there is much less demand for skills in R due to better Python APIs.
It got me a foothold in the profession as I was using R back then. I would say that it is good to sign up for a year only, but you will gradually outgrow the content after a year.