They're not bad at all. You don't realize you have them on, and you can actually read things. You don't have to copy your friends notes in class because you can't see the board. YOU CAN ACTUALLY READ IT!
One annoying thing though, is if you want to lay down while watching tv or something, my glasses hit the sofa before my head does, so if my head touches the sofa it will break my glasses.
I don't wear my glasses because:
a) I don't like the way they look on me
b) Half the time I don't know where they are
c) I need a new prescription
d) I can see quite fine, it's just long distance stuff that's hard. I always have to squint to see things on television but whatever.
I do reccommend to wear them. If you need them for reading long distance, reading, watching tv and stuff like that, and you don't like to wear them all the time, wear them then. Like if you got them because you can't see in class, bring them to class, and wear them when you need them.