I've heard the 4PT at several shows-- with performance varying from average to superb. The best so far was as personally set up and demoed by Franc Kuzma at CES. He demoed the 4PT on a redesigned Stabi Reference table. The TT now has a belt-driven single DC motor with enough torque to get the LP to full speed in one revolution. This lets you queue up a stationary record, sit down on the couch, and start play via remote control. A very convincing demo.
BTW he mentioned that the Airline still surpasses the 4PT.
BTW he mentioned that the Airline still surpasses the 4PT.