Barring any possible weakness with the lead screw for the sliding bed, this looks like a novel and solid contender to the likes of other full size lathes. I'm going to guess that they are using an acme thread for the sliding table, since they've opted to that on the tailstock as well. Acme threads are less likely to bind up from my recollection and can carry higher loads, and is what you'd find on feed screw applications for machine tools. I think you'd have to get in habit of regularly cleaning and oiling down the sliding members (WD40 or Teflon spray/wipe).
Rest of it looks solid to me, the sliding table will lockdown, the control box can be moved, the index feature looks good, 3HP is always good..., weight about same as PM3520. Don't see any height adjustability, would be nice to know what the height to the center is off the floor.