Pros: good sound with plenty of bass, remote and microphone work well (with iPhone 5), tangle free flat cable very useful, not too heavy in the ear, L-shaped connector seems strong. Bought these to replace Sennheiser CX300-IIs, which have the same sound but rubbish build and constantly break. I'm hoping these will last longer and so far it's looking good. The bass is good once you've figured out which size buds to use, and there's plenty of choice - pick the one with the best seal in your ear. Blocks noise well just like the Sennheisers which means I'm happy to use them to commute.
Cons: I say not too heavy in the ear but they are noticeable due to the way the cable enters the headpiece, so if you want something really light, these aren't for you.