Sometimes it sounds good but other times it's just annoying.
An old band of mine (well, just me and my brother on drums) did a comedy song about 10 years ago that I thought sounded pretty good as far as the music goes. (even thought the lyrics were kinda weird).
But all anybody ever did was comment about the scratchy noises all the way through the song. Especially in a car stereo system with subs etc...

http://s93744050.onlinehome.us/mp3/ILoveHer.MP3

Some people didn't even notice the song cause the string scratches were so loud.
Unfortunately we didn't have enough money to re-record it, so it stuck.

(and yeah it's supposed to be a stupid song obviously although you'd be suprised how many people dance to it at parties...while we sit in the background and laugh our asses off)