Coming from the Warthog, the preinstalled springs (I'm guessing #20A) are way too light - they give about 1/4 of the resistance of the unmodified Warthog which means that in a dogfight the stick offers virtually no noticeable feedback on how hard you're pulling. Takes a while to figure out the right springs that offer a discernible feel.
My particular base also has a slight problem with re-centering from a deflection to the left, but from all the other directions it re-centers itself every single time. I really love how sensitive the base is around the centre which is great for formation flying and AAR.
Although I'm not liking the plastic feel of the grip itself I love all the extra buttons/axes the grip has over the Warthog. Kinda wish the MCG Ultimate grip is sold separately on the AU store.