The M-audio ones are kind of known to have an awfully low clipping point. It's not a problem if you use dynamic mics, or if you record quieter sources, but it can rear it's ugly head on vocalists who like to scream and swallow the mic . . . or for angry drummers on a mission to break their heads.
Just make sure your drummer has taken his ritalyn, or tell your singers to back up from the mic a little.
Used properly, the audio buddy is actually one of the better bargains in audio - two very clean, low-noise channels of gain for a measley $100.