Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Great USB Interface for Guitar!

The M-Audio Fast Track is an amazing USB interface for the electric guitar. I use the Fast Track on Vista x64 (drivers are available on M-Audio's website) in conjunction with Guitar Rig 3 and Ableton Live 6 to record guitar riffs.While using the Fast Track in Ableton Live, the sound is outputted through the headphone connection of the USB interface. The sound quality is excellent and there is no lag or delay in playing and hearing the sound. The back of the unit also allows for external speaker monitoring, if you prefer speakers over headphones.There is an XLR Microphone input and level control knob. I don't have a mic, however this gives me the option to upgrade my digital recording experience when needed.I have truly enjoyed using this product and would recommend it for the entry-level digital musician. Be sure to combine this product with a software product like Guitar Rig, in order to generate amp and pedal sounds.