I would consider myself a fairly unserious paredit user and I still think it's immensely useful. The things I use most of the time are really just barf, slurp and splice yet it makes so much more sense to me now to think of S-expressions structurally rather than just editing text.

Both the advantage and disadvantage of lisp are its lack of structure and paredit forcing you to keep your code intact really prevents a ton of issues just by having it on.