Pros: Light weight, "Fast" bass.
Cons: None at this price point.
I've used several earphones by several companies and at price points ranging from $50-$400 but I use these while commuting by train in Tokyo. I bought mine in Japan for ￥4500 or about $50 retail after listening to them after having read in Hi-Fi + magazine. I tried various earphones at the store but failed to find a pair that surpassed them at the price point. I prefer a crisp and detailed sound over overly bass heavy earphones and these delivered both the acceleration, and torque that I wanted. Acceleration meaning fast and detailed - Torque as in bass size and weight.
I could rate them higher but decided against doing so because being objective there are better earphones but at a much higher price point.
I also own a pair of B&W P5's, Sony MDR-1RBT, and Sony MDR-HW700 9.1 surround headphones for night time movie viewing.