Feature:
I'm reluctant to write this... This unit has ONE OF THE BEST SOUNDING, EASIEST TO USE DRUM MACHINES you can find anywhere built into it. I bought this thing as a portable practice keyboard because it's very light and has decent sound. Only after I brought it home did I discover the drum machine buried among all the other features. I couldn't believe how great it was. I'm a songwriter with a home studio, and hate the tedious programming many drum machines demand. You can't build a drum pattern note by note with this keyboard, but the 100+ pre-recorded patterns sound professional, include intros, fills, A & B versions, and endings, and the programming is dead simple once you figure out the built in 2-track recorder. It's now my primary drum machine, slaving my multitrack recorder via MIDI.

Quality:
It's light and made of plastic. The key action is not for serious players. The real value is in the quality and quantity of the sounds, and the above mentioned drum machine.

Value:
Yamaha impresses me again. I've had great experiences with their products over the last 20+ years. There is value in this keyboard for everyone from beginner music students to music professionals.

Sound:
Sounds acceptable through the built in speakers. Sounds fantastic through the headphone/output jack.

Ease of Use:
This thing does a lot for an inexpensive keyboard. Some functions require cracking open the manual to figure out.