It's good, but I thought 3 was better.
It's not exactly like the
games entire First-person Dungeon-crawling genre changes much between iterations.
Fixed that for ya. There are ones that stumble, and the occasional odd branch that looks kinda like a new concept, but otherwise if you liked the demo, and have even a little experience with the genre...well, what you saw is what you get, so there's not really much left to ask about.