The 16-ounce size is perfect for my morning latte, and the thick glass base keeps it warm longer than my old thin mugs did. They feel sturdy in hand without being heavy, and the six-pack means there's always a clean one ready.
Bought these for our weekend brunches and the 16-ounce size means one fill gets everyone through the meal without constant refills. The glass stays clear after dozens of dishwasher cycles too, no clouding at all.