And it's also fastest way to trade, buying nor selling though it still depend on what machine you're using and it actually does with 15 seconds operation which is doing in phone can't happen. Also there some machine that also support eth, bch and ltc. So you shall gonna scan the qr code and you can also verify it through sms.

So this whole thing is great especially for people that don't have any bank accounts which is needed to buy bitcoin in trading site however the cons here is the fee, it actually reach almost 30% commission in one transaction and it's pity thinking it's worth some few satoshis.