I received this mug as a gift and find it has a number of flaws. First, it doesn't keep the coffee hot as long as other mugs I have owned. Another problem, and most annoying, is that it does not provide "nose" space. When I take a sip, the tip of my nose gets squashed against the lid, and my nose is not at all large.As someone else mentioned, it has an interior lip around the upper edge and when you rinse it, water gets caught in there and dribbles back down when you set it upright, so there is always a puddle at the bottom. The only way to get it out is with a towel. The mug is narrow and it's hard to get your hand down in there. I am a woman and my hands are average size.The lid is hard to position, too. I will say that this mug is leak proof, but my old Nissan leak proof was far superior.