I've started the Medium, although on PC. Not that long in, just got in the building via the dumpster (not a spoiler at all, trust me) and I have to say it already seems very mediocre.
I like the setting, but that's clearly where all the budget went. The character design and animations are absolutely woeful, they are so out of place with the environments it's not even funny. Also the spirit world lacks any kind of style, certainly not as polished as the main world especially when they try so hard to show off their RT implementation in the rain/puddles, but absolutely nowhere else...it's a very weird choice. The story has started predictable and not particularly well written, and the cardinal sin of game design has once again been cast upon us...why the feck do they think changing the active button adds any depth??? X becomes Y at times, that's a huge bug bear and a design no no, yet so many "interactive story" games like this do it. Finally, there's a lack of atmosphere, the sound design so far is non-existent which is a bit odd considering they make a point of wearing headphones. Perhaps that is to come though, but you'd expect a game like this to start off heavy on the build-up.
However I'm going to continue playing as I assume (probably wrongly, but fingers crossed) that the main gameplay hook will actually throw up some interesting puzzles. Oh and the fact I didn't expect Booker DeWitt to show up!