Just... What can I say here? Its amazing. An incredibly faithful remake of a cult classic, like I've never seen done before. Nightdive was faithful to a fault here, and I do mean that. The game is very good, I had a great time with it.
I played it on medium; The combat feels good, the puzzles are decently challenging at the start, but get easier over time as you understand them and how they work and the story is conveyed almost entirely through the comm messages; there is no tracker on your HUD to tell you go here, do this and so on. If, you get an objective, you better remember it otherwise, you're gonna be stuck running around blind, with no clue what you're doing. Granted, you could bumble your way through the whole game that way, but I doubt you'd have the best time doing so. System Shock Remake really wants you to pay attention and I respect that, since it respects me enough to ask that of me.
Its not all perfect, unfortunately. I wish there could have been a few QOL improvements. Your character moves really weirdly; slow and clunky and it had the tendency to make some combat encounters frustrating; not impossible, but it felt irritating when I felt like the character should dodge but took a blast to the face instead. The hotbar is limited to holding 4 weapons, 3 explosives and 3 consumables, but I wish I could choose to put as many of each as I wanted, within the confines of my 10 buttons.
SPOILER ALERT: One specific level is just so gosh darn boring. That level was criticized in the original game, and this was NOT an improvement, unfortunately.
All in all, System shock is a wonderful game, but it comes just short of touching greatness. But if you really want to experience the original System Shock, without the barriers of the old UI, this remake is really the way to go. I can't recommend it enough.