The film has its weaknesses, no question about that. But it's a lot of fun. If we're leaving out the end titles, it's exactly 90 minutes (you'll get the joke after watching it). The characters do work and they even dare to show a little bit of the not so nice side about film-making, granted it's toned down and all ends well anyway. Though there is a bit of a hidden message there.
Banker board scene I've seen criticised. But it works for me in that the boss turning up knows the camera is running and the amount of audience they're currently having. And so do the board members realise. (And what that could mean for PR.)