I greatly prefer the OPD knob of a 5lb tank to the plastic-covered valve of the newer Performers. What annoys me far more than having to lift a SSP's table top is having to scrunch down, flip up that cheap plastic door, hope I got it clicked in so that stays open, look for the knob, and pray that it doesn't just SPIN on the shaft ... the top panel layout of the SSP is my fav.