Unfortunately I was stupid enough to try exchange OKCOIN.com - the whole experience
was a nightmare.

The beginning was smooth, I have registered an account, verified my phone via
SMS, verified my ID and bank. I transferred a few BTC, sold it for the price I
wanted.

And now I wanted to withdraw my money. SMS verification magically stopped
functioning. I have contacted live support, they told me they must... verify
my account. Some Chinese girl with a hyper bad English rang me and asked for my
passport number. I have provided all details, she told me an SMS code I need to
use. The code did not work. After 20 minutes on the phone she told me she can
unblock my SMS, but I must send the passport scan again. I have sent it, the
codes started to work again.

I was able to withdraw the money!

Waiting few days, and instead of the expected amount, I have received $36 less. I
am contacing live support again and asking where my money has disappered. I'm
waiting for a few minutes and geting an answer: bank charges!

I'm going back to their web page, and it was clearly written: withdrawal
charges: "0.1% or $15 plus what your bank charges you". I have paid 3.00% and
my bank did not charge me any cent. The support says they are sorry, they
should change their web page, as it is 0.1% plus all bank charges, in my
example it was not expected $15, but... $51.

I proposed to give me back $36, as those charges were not stated on their
page. Support refused, claiming it was not their fault. I asked if it was my
fault. No, it was nobody's fault. If it was nobody's fault, where is my $36?
Bank took it.

Support says sorry and told me they will update the webpage with information
about charges. They updated it, indeed, now it says: "USD: Minimum fee of $15,
0.1% plus whatever fees charged by the bank and/or processing party."
So now it is clear, now you must pay whatever.

Summary: do not use OKCOIN until you like your money and you are not prepared
for paying whatever.