This tumbler fits perfectly in my hand, and in the cup holder of my car. The splash guard makes it so that I never spill or get coffee splashed up on my nose when I take a sip. It's stylish, easy to clean, and perfect!
Overall I love these mugs. They're durable, hold temp well, and are easy to clean. My only beef is that it seems really easy to put the lid on with the threads off so that it's cross threaded. Not sure if I'm doing something wrong, but it's happened 2-3 times in the first week or so of owning it.