My Upwork experience started from March, 2018. I used to have up to ten clients. But the one was strange. It was Emma Serlin. Firstly, she asked to prepare the transcription without opening a contract. Secondly, she said that the result was great and opened the contract in order to pay for the previous file. Then she asked for another transcription and suddenly ended the contract with low feedback. After I asked her what was wrong, she said that she was not satisfied with the results. I can't understand, why she didn't say that she didn't like something when she actually did not like and asked for changes. I don't think this is reasonable. Be aware of such kind of employers, who can make a poo to your job success score.