Yep, I saw the movie last week and enjoyed it as well. I'm also a big PM fan since the 60's, saw him live in '89 and have been in an A/E Beatles band since 2012.
Certainly an interesting review of this period in his career. The film certainly clarified a few points concerning the end of The Beatles, and included some poignant John and Paul moments.
One of the most interesting things (which no doubt led to Wings achieving their peak) was Paul's lack of awareness concerning his fellow musicians. Not judging here at all, but Paul had left the biggest, most famous band in the world and was obviously set financially, but appeared to be oblivious to financial situation of guitarist Henry McCullough and drummer Denny Seiwell (no doubt Denny Laine was likely in better shape financially than the other two.) It was mentioned that these guys were on a limited retainer, so when Paul mentioned later that they were going to be recording in Lagos (Africa,) they both bailed.
It was fascinating that Paul mentioned he had the attitude that this was a band building it's way up as mates like The Beatles, so financial rewards would follow as the band became more successful. As was revealed in the documentary, this contributed directly to the success of the "Band On the Run" album, and eventually to the change in personnel and band peak during the mid-70's.