Weight and cost (I wasn't booking at the time) are what convinced me to return a Kurzweil PC 88. I'm still kicking myself over that one. I then went out and bought an Alesis Q8; I put up with the added weight for a while, but didn't like the feel or sound, so I sold it. I still miss the PC88, but now I console myself with a Mark 5 Grand which plays and sounds just like it - it's 4x as heavy, but I don't move it from the living room. (For sale, one Kurzweil Mark5 Grand).