The good: it controls my iPhone and works with voice control commands.
The bad: it feels cheap, it doesn't have the band that keeps both earphones together when rolling the cable to store in its pouch (so the cable gets entangled quite easily every time I take it out of the pouch).
Also, and critically, the microphone is very bad. The idea of the mic is that you can talk while you're walking down the street or on a bus or anywhere really. Well, it picks up a lot more of the background noise than your voice so people on the other end hear the noise but barely hear your voice.
Not a good purchase. Especially not at £50! I will go for a cheaper option and at worst it will be the same quality (but at a fraction of the price).