Conclusion: These headphone definitely block outside noise and are comfortable to wear and have good sound quality. The only thing I do not like is when I'm wearing them while exercising any movement of the cord is amplified in the ear buds. For that reason alone I would not likely spend the money to purchase this item again.
Conclusion: I really fell in love with Klipsch S4's with my black s4i's but those broke after about 1.5-2years of use (rough gym use included) and couldn't really imagine using any other headphones. Came across this website with a nice discounted price for the white s4's and never looked back :). Also bought the Reference s4i from here for my girlfriend, she really loves those as well.
Conclusion: I would recommend this product because for the price the earbuds are pretty good quality. It comes in a really cool case with different sized and shaped ear tips so you are able to get a good fit. I think this is a good balance of a really good product for the price. I did have to speak to customer service and they were excellent.