From the articlePros

• Fast implementation of basic administrative functionality
• Community support for libraries
• Several ready-made integrations with libraries from other frameworks(for example, VichUploaderBundle and UserBundle)
• Customer-ready admin panel design

Cons

• It may be more difficult to implement custom functionality in some cases.
• You’ll have to follow the ideology of the library and adapt to its capabilities as well as to its limitations.
• You’ll be dependent on a ready-made solution. In some cases, you’ll have to wait for a solution to a problem in a library or get into someone else’s code yourself. But this is an open-source framework and getting into someone else’s code is considered the norm. In fact, there are stable release versions that supposedly have a minimum number of bugs.