I loved it too. I really fell into the atmospheric B&W noir, and felt like I was living in 1960/61.
Scott plays Ripley in a really sociopathic way, without much 'affect', which is true to the book.
Interestingly, read an interview with him yesterday which made me feel that Flynn's depiction of Dickie was truer to the book too, in that he didn't have much talent or charisma and had got where he was through wealth alone. Vacuous wealthy people drifting around, amusing themselves with blow-ins like Ripley, thinking themselves safe from anything edgy because of their wealth. You can imagine this incensing Ripley, who was a better artist and had had to live by his wits alone.
So yeah, I loved it, found it menacing and gripping. I went from hating Ripley (loathing him even, at one point!) to rooting for him, and I'm still not sure how my mind turned!
Loved Dakota Fanning as Marge. Loved her style, her disappointment and heartbreak - loved everything about her.
It's years since I saw the Jude Law and Matt Damon film, but have a vague memory of it being more Hollywood-ish. I clicked onto a tiny snippet of it just now and Gwyneth Paltrow didn't feel like Marge any more. It felt like I was watching actors acting, whereas in Netflix's Ripley, it felt like I really didn't know what the hell was going to happen next, and I loved that.