I have had a cracked snap (once & I have bought a whole mess of seconds), some wonky stitching, marks that wash out that sort of thing. Typical things are dirt & wonky stitches. Like on the aplix where it goes off the edge or over toward the middle. That cracked snap was the worst thing I have ever had wrong with a second. I have heard of PUL snags/ holes but those affect function & CB makes that right.
Jodie ~ mama to Big K, Medium K & Lil' k