I have the full CH Products setup (including pedals) and I have to say, as much as I love the pedals for immersion, authenticity and fine tuning will doing gun strafing, they arent overly necessary for A-10C.
Now - in Rise of Flight? - No Pedals = DEAD fast. For that game, if you want to play you MUST have pedals, no two ways about it. In fact, I would say pedals are more important than the joystick.
With A-10C - they can come later.