I bought this so I could pour coffee in the morning (and skip spending money on the way to work) and enjoy it several hours later. It does exactly that. It's also an easy clean (I use on of those brushes on a stick), and relatively light. The only downfall is that drinking directly out of it can be difficult because it's hard to tell how hot the beverage is until it's in your mouth. It also pressurizes and can shoot a small amount of liquid out when first opened.
This mug does everything it is supposed to. It will keep coffee warm for several hours and is completely spill proof. It seems pretty strong also as I've dropped it onto concrete several times and there is no damage to the body or lid. The only reason I don't give it a perfect score is that it doesn't fit in the cup holder on either of my cars. It can be jammed in, but when removing, the rubber bottom sticks to the rubber material of the cup holder and pulls it out also. Granted I have a Tacoma and 4Runner so it may be Toyota's cup holders are just a weird size though.