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This Fast Track model is one of their earlier models, made obvious by the use of separate 1/4" and XLR connections as opposed to the more modern Neutrik combo connections. Other than this, the model shares many of the same features with the newer models, including input/playback monitoring, 1/8" headphone output, RCA outputs, line level/intrument level switch for the 1/4" input, as well as up to 24-bit/48kHz resolution. For all the features that were included, one of the most glaring omissions is a gain knob and clipping indicator for the 1/4" input. While this missing feature hasn't led to any problems with my gear, it is certainly worth noting. Also worth noting, though likely only affecting a select few, while many current audio interfaces can be used to "cheat" the PC version of Rocksmith, this model will not work, as the mic input is input 1 with the 1/4" input being ignored by the game altogether.
Starting in OS X Mavericks support for this device has been dwindling. Several Macs are incompatible and the whole series was sold off to Avid. I recommend buying a new M-Audio device. I'm having to reset it several times a day but I've had it 5 years and have recorded most of my first album with it.