51talk is a scam
51talk is a scam! They offer very professional demo lessons, 1 hour. (further lessons are offered as 25min) Not native, some Pinay tutors. Then you want to buy a month, you discover there is no option to pay. You contact, but they respond in Chinese. Operators are almost incapable of English conversation. Anyway they say there is no 1 month plan, only 6 month with full prepay (!SIC). Now when you ask where on their website is the plan store (because there is no such in the offered apps).. they give you an offsite link for the $10k transaction. Ensuring you that "all the other Chinese parents do that and very happy, you can trust them" (with some lame screenshot). I say, it is a typical Chinese scam with no ends with highly professional actors hired in Philippines for heating up the target.