I know I'm in the minority with this but that last 45-30 minutes (or however long it was starting after the farm sequence) was really weak. That's when I felt it was retreading old, stale ground. At this point, we've seen the X-Men disbanded or in dire straits close to 3-4 times, now, and Wolverine fighting similarly powered mutants an equal number of times. I really wish it rather than falling into the big, superfluous climax of Logan chopping nameless dudes with guns and/or fighting another clawed, super-healing mutant (again), they had cut back on some of that and spent that time to further develop or just study the main three characters. It would have laid a different, more human, foundation on which to attach to these characters rather than rely on "Hey, it's that guy we all know; watch him die, again". I think that would've also helped me be more excited by the climax at end of the film, to just have that breathing room to build up to that literal final shootout, rather than temper it with scenes beforehand of (a) Logan continuing to butcher dudes.
Don't get me wrong, I liked the film, I think it's what these kind of movies need right now; it shows the potential of what these movies always could have been. In a way, it reminds me a lot of the first X-Men film that came out at the start of the new millennium, in how it took the stuff seriously (as much as it could) and really strove to be a film first and foremost rather than a "comic" film. And like the first film, do I think it's a great film? No, definitely not. But I do think it a good film. Yes, absolutely. I'd go so far to say that it's one of the better of these films I've seen put out. I just wish it had been tighter and more polished.
...I still need to re-watch Shane.