I only had one W-body. It was a 1997 Chevrolet Monte Carlo Z34. Unfortunately, due to the previous owner's neglect, this car was a nightmare for me. A shame, because I thought it was rather handsome in black.
The cable to the shifter broke and left me stranded, it had some sort of engine management problem (it idled lumpily and unevenly with stalling, even with new plugs/wires), the transmission was failing (the engine would sometimes just free-rev during acceleration), the moon roof was broke, headgaskets were replaced and began failing again, yes, the alternator failed (big surprise there) and left me stranded at the main light in the left turn lane in the town where I live, and the airconditioning failed during summer #2, and because of that previous owner, something stunk in that car when I first got it, but I reduced the problem so it wasn't seriously noticable. I also didn't care for how the car handled off-throttle.
I only had my Monte for one year. I traded it in as soon as I had my little personal loan paid off and got my 1996 Plymouth Breeze.
I can say that the Monte is reasonable safe! I was going to Angola one February Sunday after work, and although the freeway was clear, there was slush on the exit ramp. The tail started to slide out. I thought I caught it. But it whipped back the other way, and that was it. Somehow, someway, I spun big time, and the car slammed (driverside, of course) into some massive sign post or whatever. Popped a piece of dash off, no more driverside mirror, no window, cell phone flew out the window, and the door was smashed in and cut in a few places.