Listening to music devices at school has negative stuff, but also postive stuff.....

Question

i will have add more and make it look like a complete organized sentence but what can i say instead of stuff.

How about:

Listening to music devices at school has both negative and positive effects.

Listening to music devices at school has negative effects, but also positive outcomes

http://education.yahoo.com/reference/thesaurus/entry/stuff

I didn't see much at the site. effects? vibes?