I'm still enjoying it. As much as the medical stuff went on, it was meticulous and thorough (I imagine it was well researched and accurate) and finally showed Paul in a position where he has no power, completely at the hands of the medical staff. Even when he was arrested, he was exerting his influence.
I loved the scenes with Stella and Tom Stagg, probably the best moment of the episode for me, and I'm intrigued to see how Rose develops, the coldness/numbness she exhibited when with her husband, the daughter's painting etc. Really hope they explore her progression and/or recovery further. Stella's scene with the older patient was another great moment.
My only criticism is the tunnel scenes. It seemed too juvenile and cliched, just out of sync with the rest of the show. Presumably with how episode 1 ended, we'll not be seeing any more of them.