LizzyM recommended brevity, something along the lines of "skipping the warm and fuzzies." She gave an example of a more brief statement of what you got out of it keeping it down to a sentence or two. That being said she also recommended not really "reflecting" on items like tutoring at an elementary school unless there was something different that the usual, aka the adcoms know what goes into and comes out of tutoring.
Note: I am PRETTY sure all of this came from lizzyM, simply because I cant recall exactly what she said and I'm not taking the time to look, BUT I AM sure all of this comes from either her or other adcoms I've heard speak and or post, thus it is all applicable.