The Yamaha P121 is nearly identical to the P125, the only difference being that the 121 has less keys than the 125. Not too many people talk about the 121, and I feel that it probably doesn't sell as well as the 125, either. But how detrimental is the lack of keys? Does it dramatically hurt the value of the P121 as a serious instrument? Or does it actually help, making the instrument smaller, lighter, and more compact? Let's find out!
