At first I had my doubts because their website is written in very poor English and their so-called 'livechat' is just an automated computer which doesn't answer to your question and closes the chat after 5 minutes.
After seeing their very low prices (they're like 50% cheaper than the site I used to buy from) I decided to give it a try though.
They support a lot of payment method, big +1 on that.
Paid, entered my player's details and waited. I only had to wait for 20-30 minutes and I got the 1.000.000 coins I ordered. Looking at the fact that the web app/transfer market is down, that's a pretty fast delivery. Overall I'm satisfied. Poor customer service, poor website, but good prices and delivery speeds.
So if you're looking for the cheapest price and a fairly fast delivery, buy from Goldah. If you're looking for good customer service, then don't. I guess if you're having problems they can't be solved because there livechat. Is no livechat.