Steven: For Volume Analysis, that is true. However, it doesn't allow me to control how high/low I want the album's volume to be (the default on MP3Gain is 89.0 dB, but in most cases, I like my albums to be louder than that, about 92 to 94 dB). Also, it doesn't detect clipping either.
Also, I use MP3Tag since I can use its Extended Tags feature (similar to MB's Tag Inspector) to edit multiple tags at a time.
VX: Exactly.