Yesterday I was exploring the TOS interior with 3 other people invited. 2 of us experienced no problems, but the other 2 went into free fall the majority of the times when we tried using the turbolift. When using the jeffries tube we came out perched on the exterior geometry and any move would send us into free fall.
Other than that bug, I love the work done on this interior set.
My other only dislike about the set is that when the borg impulse engine is placed on the TOS shuttle the plasma stream is wider than the shuttle itself, from the rear it looks like you're piloting a green streak with no source.