The platfrom itself is reputable but since you're trading with other individuals, you could come across carders/scammers and because of that, I rather not list it here.
I saw a guy accusing that paxful was not clean. He was denied payment of 0.4 BTC and when he requested support he was denied. The topic is located
hereI'm not sure what he said is true, because he has no evidence, but with the information you give, it is not secure, there is always a risk of losing money anytime.