The game feels decent with the Xbox controller (which is a plus for me, definitely.) My only complaint is that menus seem kind of... really hard to navigate. Pressing up seems to work about 80% of the time, pressing down seems to work about 40% of the time. As the TC said, it might be due to working when the direction is hit and then released. I won't complain about the default controls because they can be rebound.
Firing at a downward angle seems somewhat tricky to me. That might be because I just recently got my controller, so I'm not used to it yet.
Also, on an unrelated note (because I don't want to make a new thread for this), how difficult would it be to create a slider or combo box for increasing the text size? I have a really hard time reading it.