There are no advantages. Starting from the quality of the whole component and ending with the boorish behavior of the staff. The question: "where can I get a book of complaints and suggestions" is answered: "Have a nice day." The coin acceptance machine "ate" more and gave out less. It would seem that your machine is faulty - so resolve the issue with the client (judging by the comments, this is not the first time). Thanks to Gennady, for such a nice conversation!