Their new CS is pretty awesome. When I first got my USP Tactical I decided to swap out for a heavier recoil spring to shoot .45 Super with. The stupid custom sized c-clip on the front holding the whole recoil spring system magically disappeared. Their old CS completely ignored all my inquiries about purchasing a replacement.
Recently my USP Tactical rear sight was damaged. Somehow a piece was knocked out on the inside of the sight. Still have no idea how the sight blade was damaged on the inside, but I called HK and they paid shipping both ways. Got the gun back with a brand new adjustable target sight and the c-clip was replaced in about 2 weeks.