I'll be traveling to San Ignacio in a couple weeks and would really like to do the Tikal Overnight. Based on everything I read on the forums and the reviews, it seems that Pacz and Max Adventure are the two that are most highly rated. There's about a $100USD difference between the two tours and, from what I can tell, the only difference is that Pacz leaves earlier and offers 3 tours of the ruins (afternoon, sunset and sunrise) whereas Max Adventure leaves later and offers two (sunset and sunrise).
I would love to hear anyone's thoughts, opinion, advice if they've taken the tour with either company or if two tours of the ruin or more than enough. Many thanks!