When we were looking to replace our dishes, we looked to Corelle, with its reputation for quality (and warranty.) These days, most Corelle only has a 3-year warranty; Corelle Ultra has a 5-year warranty.
So we got the Ultra, and the one time we broke a plate, we found out that the warranty is functionally useless: they cover damage that occurs only during "normal usage" and not, say, dropping. But if a plate fell apart during washing, by golly, then we'd have them.
They're high-quality plates, and I fully expect we'll be using them for years and years to come. But we've concluded it was a mistake to pay a premium for the unhelpful warranty.