I am created this topic just to discuss about which platform or website that providing the best service in your opinion so other can know and have a choice or at least we will have other option.

In my opion BitStamps is the best and fastest platform to buy bitcoins and then Coins Base, how about you?

I never had any problems buying with CC/Debit Visa both in Binance and CoinMama. I don't trust CoinBase because of the upcoming IPO and regulation requirements.
Keep in mind that you will have to pass KYC wherever you decide to you a card to buy crypto.