Hey, I am just a newbie.  I also start to use stored procedures and I can't find out what actually cons and pros of using qualified object name except of performance.   It's not my laziness on typing 'dbo.'.  Just my boss asked me any cons and pros of NOT using qualified object name. 

In my point of view, with qualified object name can let me know what the object is actually used, but I need to amend code before releasing to production environment. A newbie is just a newbie.....