I gave it a 4 since I didn't see a 4.46898764 rating. (smile). Perhaps like most, I was too eager to try this in auto mode - and figured I could successfully do so with little reading. NO GO! The files to be mastered must be in a certain format - he provides the tools to convert! Each "error" I have encountered was due to file format. It will mix according to "references" - and he provides dozens to start with. I have already used a commercial recording to manufacture additional reference. It made a particular original composition sound even sweeter. This doesn't replace that a decent mix needs to be input first - ie enter one with too loud of a bass drum then it may still come out as such. You can, however, listen to one of the tracks written in stages and edit them. I must admit, I can hardly wait to make my first of what I hope will be many donations - I plan to use it on others' projects when I become more proficient! I did get another type of error - out of memory - I have a work around. Since the program labels every phase of mastering on a separate file, simply use the last "good" file and continue the processing on the next step. If you have found one reference that you like for a number of files, they can be processed in batch mode.