It is OK, I had the software from when it was free and I have to say that it is the simplest I know. You just drag and drop and is all. It automatically add the BPM tagfield to the file —tested with Foobar2000—. The only con I have found now that I using it after a long time ago it is that having a big library you do not have a clue of how many files it is left to complete the task. I mean that if you select two or more files you do not have a bar with "you have selected 2 files" or something alike.