Opinion on oracle tonearm

I just bought an Oracle tonearm. Please post your experience of this tonearm. I noted that the VTA adjustment similar to VPI and Tri-planar tonearms. When did Oracle came out with this arm? It seems that there was some looseness in the VTA mechanism when the lock nut was loosen for VTA. This looseness in the VTA column can change the VTA after tightening the lock bolt. I wonder if the VPI and Tri-planar exhibit the same problem also. Thanks