I have five. Two have had issues. The first, a 66 purchased in 1987, had the ejector rod sleeve work loose after several years, locking the cylinder shut. Easy fix, just tighten it. The second, a model 94, purchased in 2014, has chambers that are too tight, making fired brass difficult to eject. It needs to go back to Taurus to correct that; I just haven't gotten around to it.
My PT-22 and PT-25, both made in the mid-1990s, have been flawless. I also have a model 85 3-inch, in stainless steel, which is a downright handsome piece, and quite pleasant on the range. It was made in 1995 and, admittedly, I haven't fired a lot through it, as I've only had it a few months.