I wore out a stab from NAPA in a little over a month (obviously there was more to the problem - track bar I think, have since replaced it with an adjustable one). I have since replaced it with a "Heavy Duty" Teraflex stab. However, it looks suspiciously similar to the one I got at NAPA, save the mount is a little bigger. Im starting to wonder if I paid $35 for a stab and $15 for the Teraflex sticker on it.
On the bright side I havent had even the slightest symptom of DW since I installed it (problem is I replaced the track bar the same day
so I cant be sure I fixed it). I guess I will know if I wear out this stabilizer.