How long does the belt last for?
Not sure - I would say depends on the climate. I haven noticed any difference in performance, speed variation or any change in the Belt in three years of having the DPS.
I must of gotten one of the last DPS turntables in Australia because the guy who sold it to me had an extra bearing and an extra uncut acrylic armboard.
I guess the previous owner ordered the extra board and bearing to be able to install a different arm at a later time (since the whole top with bearing is changed for a different arm).