What are the pros and cons of using interfaces in Delphi?

Question

I have used Delphi classes for a while now but never really got into using interfaces. I already have read a bit about them but want to learn more.

I would like to hear

Answer 1

All I say is that interfaces WITHOUT reference counting are VERY HIGH on my wishlist for delphi!!!

--> The real use of interfaces is the declaration of an interface. Not the ability for reference counting!