ETA: MiniInTheBox contacted me (one of the best customer services I ever encountered on this world wide web, I must say) and was kind enough to offer me a refund. But I still feel like I should warn people that this adapter might not be suitable to use with appliances with high energy consumption - such as, a hairdryer.
I do recommend it to anyone who needs an adapter to charge their everyday gadgets (mobile phone, mp3 player, laptop etc). If that's what you're looking for, then go for it. It's cheap and will get the job done.