Instruct: Classify the given Amazon review as either positive or negative.
Query: Yamaha P-80 Digital Keyboard

Great digital keyboard for beginners or teachers. Weighted keys add a realistic feel and provide finger strengthening. Full sized, with 88 keys, from low A to high C. Control Panel allows adjustment of volume, metronome, demos, record & playback, voice/variation, effects and reverb. Keyboard can connected directly to MAC or IBM/PC compatible computers via the MIDI IN/OUT connectors and a MIDI interface...