Hi
Did anyone use cex.io is it good exchanger ?
I want to buy thought my credit card and withdraw btc to my wallet
Yes they are reliable, their platform works excellent, just make sure you use limit orders.
Don't use instant buy because you lose on the exchange.
Place a limit order as a "maker" and the fee is 0%
Depositing by card is expensive, it's your choice, instead you can wire from your bank for lower fees.