I have the FLY 9 with Xbox. There is a conflict if you connect an Xbox controller as it will disable the FLY9. Only use and start the Xbox with the FLY 9 connected, I had to reboot if I connected the Xbox controller at any time. Other than I had no problems. The trigger acts as the A button for selection of menu options and the D pad for scrolling.
You are probably aware but make sure your selector switch is in the correct position for BOP and normal Xbox use and not for PC use/Ace Combat.
Unfortunately I cannot test the exact switch functions for selecting menu options as I rebuilt mine to use the internals from my AV8R (I got fed up with changing or re-charging batteries due to lack of organisational skills on my part ...
).
Other than that it has been very durable and reliable except for a manufacturing problem regards the wiring to the twist rudder which keep parting company. Many people had this problem and it can be easily cured with a simpe re-routing of the wires. Not sure if Madcatz ever changed the way the wires were routed and anchored to prevent this, never had any further problems since I did mine.