Feature:
it included the microphone which is very useful, usb is very easy to connect, the display is large enough to display scores and karaoke and is good to have the memory card slot instead of diskette

Quality:
the quality of material and finish is very good, also i had it a year ago and has never failed

Value:
for this price is the best keyboard you can get, the display is large enough for karaoke and has many features with good sound quality, voices and adequate polyphony

Desirability:
the keyboard seems that it cost much more, and has many of the features you can get in more expensive keyboards that cost almost twice

Sound:
has excellent sound, and a broad number of voices to choose from

Ease of Use:
it has a lot of features but sometimes there are many steps to get some of them, like if you want to change the dual voice, harmony or reverb styles.

Support:
i didnt need to call support, but if you want accesories is very easy to find a yamaha dealer

Overall:
the better is the sound quality and features for the price, the only bad thing is the software to transfer files, it is not at the level of this keyboard, it can not transfer long filename files, i better recomend to buy an aditional cardreader for your pc to transfer files

Ease of Use:
The only thing I am unhappy with is it is only 61 keys, and a serious student really needs a 88 key instrument