It's a very good article with a good overview of the process. However, there could be more detail included such as being more clear on the food you can feed to fry (Hikari first bites, vineger eels, baby brine shrimp), specific signs to look for when angelfish fish are breeding (being more aggressive overall, pecking at objects around the tank), and development of the fry with pictures.
This was very informative. It touches on many different details so that people won’t be left with any questions after reading it. It provides a lot of information without becoming boring. Very useful for a first time breeder like me!