Sanitarium still holds up today. It's a good game, good cinematics for such an old game.
I enjoyed most of it, but it does have some flaws. Remember to save often if you just encounter something that you can 'undo'. Had a bug so a text wasn't visible so I had to redo that whole section because of it.
The slow walking, (Despite 1 character that walks faster) certain voices in the game were pretty bad.
The story is pretty nice, but I felt the ending wasn't made. It just happened and that was that.
Credits roll.
Despite the minor flaws and a bad ending. It's still worth playing.
For it's age it's certainly has aged very well.