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I must say this is a gem if you know how to use it otherwise it's just a wastage of money. Sound quality compared to other models at this price range is outstanding,if your primary aim is 'sur' you must go for it, you can tune every note -"user scale". Different instruments are present specially saxophone,sitar,santoor,strings , obviously piano are excellent. Don't have Speaker so you need to buy a amplifier speaker. The rhythms are limited and accompaniments is not present. So you have to use USB flash drive to import from external source, different operations needed to be adjusted everytime you turn on the device.You can add total 16 layers of instruments to create your own tone along with split facility. You can import different tones from computer using pendrive,and percussion too. One thing that I feel is not pleasant is the inadequacy of rhythms and accomp. Arpeggio is there.And finally it is a full fledged performing instrument and a v.good purchase if you have the tenacity.