I've played a few HEP restored games and they do look real pretty and loads of work goes into them. Even seen a couple come out of the shipping crate-box, which to this day I have never seen a better packaging job by anyone.
Now as to how they played goes, each one needed to be tweeked like a NIB pin to play correctly and for the feeds to be spot on. Would think for the price the games would have been play tested and adjusted for smoothness.
Definitely commands a higher price than normal due to materials and parts being cleaned and/or replaced.