5 DW's here, Mom has 2 and Dad has 1 as well. The stainless ones need to be broken in and with plenty of the proper lube to prevent galling, but other than that, they run very well. This is covered in their instruction manual, as well as the lubes to use and not use, especially if the gun has the Duty Treat done to it. The stainless steel they use needs a thicker lube during break in, thinner stuff like Rem Oil is too thin and the steel can gall as it wears/laps itself in. Once the gun wears itself it, you have a very smooth, slick and accurate pistol. Out of the 8 DW's I have had/used, 2 had to go back due to a bad batch of extractors (both were ECO 9mm's from the same serial # range that both got the bad part). DW swapped out the extractors, did some extra polishing and we had them back a couple weeks later, no issues since.
.45 ACP DW's
Valor
VBOB SS
VBOB Duty Treat
Guardian
CBOB SS
9mm:
PM-9
ECO 9mm x2