Whatever you do, please don't quit with a random character end regarding AI: The Somnium Files. Everyone needs to see the true ending imo. Trust me, it won't disappoint!

By the time you're ready to tackle S+, Mr. X honestly won't be a concern. He's not a huge threat once you've figured out how his mechanics work as there's, as far as I can tell, 3 rooms he won't enter. There's one choke point area where he can be a real pain in the ass but it's easy to cheese, just need to be patient.

I think the biggest concern is the time and limited saves. For S+ on Hardcore you need to finish within 2:30 and no more than 3 saves and you cannot use unlimited ammo weapons. In my opinion the 3 places to save are pretty standard throughout the run and if you screw up you need to reload instead of the continue option as it will accumulate time that way. I won't lie and say the run is easy, but I saved Hardcore for last so it was my 7th and 8th runs respectively when I went to do it and the 2nd Hardcore run in particular was super smooth.

It's been fantastic, a lot better than at launch. I've had one minor bug where the money UI box wouldn't disappear, but all I had to do was spend more for it to disappear. I'm really close to the end and would easily recommend going to it now if you were waiting for patches to iron things out like I was.