I received mine today as well and they are fantastic! The comfort, precision, and button response puts the OEM 3-button to shame. It has dramatically improved my enjoyment of the games Ive tried so far (Doom & Raiden, for the record) and I can see myself enjoying the jaguar more with these. Hard to explain, but my hands need to expend more energy on the 3-button and feel worn out grappling with it compared to the Pro. Better ergonomics. Recommended to anyone who actively plays the jag!
(I also had to push a couple of pins to get one controller in but thats an easy tweak that only needs to be done once, if at all.)
Thank you for taking on this project for all of us!