I've built a lot of Minecraft automated chicken farms and cookers.  However, I've always had a hard time explaining to my friends how they work.
 
Most of the designs on Youtube are so compact that they are hard to follow what's going on despite their genius designs.

Also, troubleshooting a complex design is very hard.
 
Since real estate in Minecraft is cheap, I designed a fully automated chicken farm/cooker and spread it out a little bit so it's easy to follow and understand.  

Please leave me some feedback.