I have heard the series implements a number of house rules, so when you do review it try to take everything with a grain of salt. I would recommend reading the Fifth Edition Player's Handbook first and or browsing the internet some to answer your questions or it might turn slightly more confusing than going in uninitiated already is. Then again, I am not sure how many they have or how extreme they are, so they might have already improved on a very solid system or just gone with what their players enjoy.

Regardless, if you do have any further questions and wish to learn the game, [@Mesonyx], I am willing to assist as well.