The soundtrack is brilliant IMO because you would never expect a revenge thriller to be filled with 60s/70s ballads, but it works. Reminds me of the Guardians of the Galaxy films being exclusively soundtracked by late 60s-early 70s rock hits.
Odenkirk is a brilliant actor and, while I didn't think much of the story or supporting cast, he alone (plus the bus sequence) made it a memorable one for me. Christopher Lloyd is cool in it as well, and I say that as someone who has still never seen Back to the Future.