I love these glasses. They look beautiful, feel great in your hand, and keep my beverages nice and warm. The only reason for 4 stars instead of 5 is that the glasses are quite fragile. We have taken to treating them like our fine glassware, never putting them in the sink or dishwasher (though technically dishwasher safe), and always drying immediately so that they don't inadvertently get broken. This is a high bar of care required for something for every day use. But, the ones that I just purchased seem a bit stronger than ones I purchased over a year ago. So, maybe this problem has been mitigated.
[This review was collected as part of a promotion.] The mugs feel sturdy and comfortable when holding. Have only tried hot liquids so far and keeps it warm a lot longer then regular mugs you get with a dinnerware set. Love the modern/sleek look! Have not tried them in the dishwasher yet.