The remedial classes for postgraduate entrance examination are almost the same. Whether it works or not depends mainly on how you apply the remedial class.
Personally, I prefer online schools for postgraduate entrance examination, such as Tiandao Online School for Postgraduate Entrance Examination. The price is relatively low and the courses can be arranged freely. If the foundation is poor, you can look at it again and again. If the foundation is good, you can skip it.
The efficiency of postgraduate entrance examination is king. Don't fight for time, find the right materials, read the right books, and find a suitable learning method, which is efficient! To associate with friends who study positive energy, it's really embarrassing to see other people's learning attitude and not work hard.