Summary: Before these, I had the Etymotic ER6's and the Ultimate Ears TripleFi. I'll be comparing the Klipschs to these.
First off, let me explain quickly why I bought these. I lost my TripleFis and frankly just wanted a pair of headphones quickly and cheaply. I had been curious about the Klipsch product and when I found these for $30 on Amazon with free 2-day shipping, I jumped: that's impulse-buy prices.
The sound quality on these is great for $30.
Pros: Very comfortable and secure, great isolation
Summary: I bought the S3 after reading reviews online. i must say, it wasn't what I had expected. I use fairly high end equipment at home for msuic, so am accustomed to good sound quality. That is a must. Howeever I really didn't need any headphones until now. coming from using a cheap 300 bucks iBall headset, I expected a lot more. The treble of the iballs seems and is far more clearer thatn the S3. So much so, that I was disappointed spending so much money on S3.