Excerpt: Ballhead is solid and keeps a Nikon D3s with a 70-200 lens immovably in place at any angle, regardless of whether the PU70 plate is on the camera or screwed onto the lens' tripod foot. Works great with Arca Swiss plates and with my Really Right Stuff L-plate.
Excerpt: I just got my B3 Double action Ballhead several weeks ago. I have only used it once so my review might not be the most accurate at this point, but so far I LOVE it! It is very easy to use and the quick release plate makes life so much easier!
Pros: Attaches Firmly, Good Stability, Large Range of Motion, Strong Clamp