I am very pleased with the quality of workmanship, my intermediate rings are neither too tight (raced with rich Click a) nor lose particles. The criticism of the large ring is unnecessary, because the two smaller nearly together give the same length, I find somewhat academic - finally you can also combine all three and so has an overall length that nunmal not come without one of the rings about. The electronic camera functions are easily transferred, the iris, however - depending on the order of rings on the camera - not always. Already on the lens strangely, ie, if I install the remote camera 36 mm ring, everything works - Apparently the transfer from the longest of the rings on the other rings is not working. I find that a bit cumbersome, but not dramatically. Overall, I am satisfied. Macro photography is always somewhat tricky, but it allows a little patience and luck simply enchanting images - and intermediate rings make all just super affordable! FYI: I use the rings between Sony SLT-A58 (camera) and Sony SAL50F18 (Lens).
