I have an MU100R which came with a PLG100VL installed. I think it is basically the same as the PLG150VL. It uses physical modeling synthesis. It's strength lies in mimicing the dynamics of an acoustic instrument--e.g., like the growl or squeal of a sax when controlled appropriately. It works best with a WX series instrument or at least with a breath controller. I had to set it up so that I could use aftertouch to control dynamics. I got some interesting sounds, but a wind controller would be better.