I recently acquired a used version of this lens and am in the process of checking it out. As there is a short time period in which I'd be allowed to return it, I'd very much appreciate timely responses. I should mention that all VR testing was done with the subject > 10 ft away as the manual said VR would be less effective at shorter distances and I am mainly interested in VR using the 105mm as a telephoto lens. I have been concerned about the VR as test shots showed only occasional improvement over not using the VR. Then I determined that if I hold the shutter button down halfway for a second or so before taking the shot, the results are much more consistent. With my other lenses I never gave this any consideration as the VR works well without any delay. Is it just that this lens requires more time for VR to settle down and so what I am finding is normal, or might there be an issue with the VR that is causing it to be less responsive than it should be? Some people mention a clicking/clunking noise when VR is engaged and disengaged. I remember only one time after taking a shot that I heard a fairly noticeable clunking noise and was rather surprised and confused as to what it might be. Does such an intermittent noise indicate a problem? Thank you.