At one point I owned 6 of them. Every 9mm worked perfectly. Every .40 had extraction issues. Trips to SAI fixed nothing. Adding an additional 1911 spring to the extractor fixed them for range use but I never trusted them fully.
Never had the 9mm, but did own a .40 for a minute. Loved the design and sights....But could never get used to it. I also had some extraction issues - Never able to trust it as a carry weapon.