Saw Logan last night too. Totally passed me by that it was going to be much more adult than normal. Swearing, ultra violent, gore (really a lot of gore), brutal, angry, tense, sad, and with healthy helpings of relevant and referential politics. If you're expecting a happy colourful explodey superhero movie, Logan is not even close to being that. The funny parts are all awkward to laugh at because something terrible happened in the middle of each one. Wow, loved the heck out of it. What a surprise, how did I miss it was going to be adult?
Talking about the plot too much will spoiler it, so I'll stay away from that other than to say just go watch it if you're in any way invested in the X-Men stuff.
As an aside, I saw it as an IMAX 2D digital projection and man, I wish I hadn't. Don't know whether it's the digital projection system or content's fault, but it looked obviously low res and pixelated in places. When I buy an IMAX ticket I don't want to notice any of that. Working in graphics has its downsides when watching stuff, but that aspect is super annoying. Great sound though!
I saw it at the IMAX too (west end) and it looked great!!