This film needs a disclaimer....
...something like: this film does not take itself seriously and neither should you. Expect Loony Tunes buffoonery and you'll have a pretty good time.
Without this disclaimer I hated this film well before I saw it and for the first 10-15 minutes of viewing and then I got it. I enjoyed it a lot more than Sin City. Sin City looked ridiculous and was inappropriately self important. This movie looked ridiculous and gladly lived up to it's appearances. Pretty well done. Sam Jackson was great as usual.