I've heard others recommend this as well.
I watched a video of the Warthog Project on YouTube. He did a before and after of the performance and visually, it looked no different from the before. I'm sure it felt much smoother though and with a few adjustments, would be much better.
So far, the only thing that bothers me is the slew controls begin inverted. I wouldn't imagine this being standard on the real A10c as I could not think of the benefits or tactical advantage of having controls this way.