Jason Segel I thought was excellent as DFW. I agree with most of the reviews I’ve seen/read. He really nailed this part, which with less diligence could have come off like Ashton Kutcher’s Steve Jobs, which was vomit-inducingly bad.
The impact of the film for me hit late. But that was not the fault of the film. My familiarity with the Lipsky book made me anticipate lines and scenes as they were happening in the first 2/3rds of the film. But I think once Wallace kind of takes down the wall of protection around him, the film really hits its stride. Overall, a wonderful film. See it twice.