I'm not familiar with it but I've read someone here in forum that suggested that site and says that it's a legit one. Since I can't share any experience of mine there because I haven't used them, this is their account in forum ChangeNOW and this is their service ANN thread [EXCHANGE]💰ChangeNOW: anonymous | limitless | 0.5% fee 💰 still I haven't found that much experience by reading their history.

ChangeNow is legit. It's a non-custodial exchange so you might get a better deal in Bittrex or Binance, but the exchange is legit.