Yes, I use PM9 and I love it. When it first came out I was not sold on it, the pressing temp for the ingots were 1000degrees and the overlay porcelain (VM9) fires at approx 900, with thin veneers of sections of crowns you could get distortion if you did not support the material with a firing paste. But Vita has brought out a add-on kit that fires at 800 degrees, with this I can do anything I like with the material. Ingots come in opaque for layered presses or zirconia overpress, transluecent for the stainig technique and now the have a range of high transluecent that come in various shades and even in two enamel shades. With all this said I only press anterior units, inlays and some onlays, I prefer to use a substructure in the posterior and for any bridge work (zirconia).
Larry