I saw it yesterday in London (the UK premiere at the London Film Festival) and it was great! Very funny and very Pavementy. Reminded me a bit of a longform "How To with John Wilson" but all about Pavement. See it in the cinema with other fans as that will add to your experience. EDIT: Forgot to say that the director, Alex Ross Perry, mentioned "2025" as its general release date in the talk after the film.
Watched this video and all I can think about is how uncomfortable SM looks to be there. Not sure if that's true but I wanna give him a hug. Love this band.