The Good
When complimenting, and pointing out strong points go into detail. Pointing out what is specifically good can also point out to a writer what needs working on, and what is successful. Some subject that may be commented on:
~ Aspects of style/ technique
~ Proper setting of mood
~ Rhythm
~ Development
~ Anything listed under criticisms can also be looked at for compliments, but generally spelling and grammar aren’t complimented.