They are better for the longevity of the gun, and better for your wallet. The near universal conversion of shooters from jacketed, lead, and plated bullets to coated bullets didn’t happen because they aren’t awesome.
It varies as sales take place. Good places to look on a regular basis are Bucking Horse Outpost and Southern Defense. Use AmmoSeek, subscribe to MrGunsNGear newsletter.
I bought a brand new DW PM9 five years ago. Worst gun purchase of my life by a long shot. Not sure what their quality is like now, but since they are so rarely seen in the wild relative to almost any other brand, I would venture to say that they stink it up quite often.