Are 16-piece tumbler-and-rocks sets worth it?

They offer the best price-per-glass and cover both tall and short pours, which is why Libbey's Ascent and Province 16-piece sets carry tens of thousands of Amazon reviews. The main caveat reviewers raise is quality control: a high-trust review at seriouseats.com flagged that a few Libbey Ascent glasses arrived flawed, and retailer reviewers note breakage in the dishwasher. Buy from a seller with an easy replacement policy.