In the wide variety of pf production that seems to happen with every big manufacturer out there, it's a ribbed playfield. A well known and trodden topic on the forum, especially recently. That pf is not perfect, but it's essentially cosmetic. In the wide variety of "minor" pf issues that occur, including ghosting, CC chipping, misaligned pf colors, off-color production or worse, ribbing is generally considered to be the most minor issue (fwiw). The TWDLE pf here is great in every way. But OTOH, there's also an older early DMD pin here that has some significant wear and tear around the inserts which I would consider much worse than ribbing. However, in the grand scheme of things, it doesn't bother me. YMMV in either case if you're a pin perfectionist.