Since I have been digging into the bitcoin and altcoin subject. I have seen sites that offer the option of buying with credit card. I have considered this idea but how does that work. You go to the site and buy a few with your credit card and get a confirmation email then see the coin in your wallet. Is this all there is to it.

Has anyone bought coin using credit card?

I am looking at sites like https://cex.io/buy-bitcoins, https://coin.mx/, http://www.plusbitcoin.net/buy-bitcoins-with-credit-card/

What your thoughts?