The application works but you can't have your itunes open while changing your song information. I adjusted the tags of a song I was playing and itunes crashed. Afterwards it indicated that my files could not be found anymore so I had to find them in the itunes folder. The name of the artist had changed so I guess that is the reason why itunes thought they were deleted. The solution was easy I just added this folder again to the itunes and now they had the correct song information. As this is a 30$ application I would expect that the integration with itunes would be better. As for what others said about the speed its indeed not a problem.