Unable to leave feedback for had tutors.A tutor Darragh wasted my time on two occasions, in fact the last session she canceled at the time of booking.I left appropriate feedback and this was done before she blocked me.The feedback was removed and Preply said feedback can’t be left for blocked accounts.They also said they will do an internal review - what ever that means.If users are unable to leave feedback how does one compare tutors?Awful system for feedback and clearly biased,Use their service with extreme caution.