I got one of these in gray, and I love it. I use it all the time for loose-leaf tea when I’m just brewing for myself.
The clear walls allow me to see how the tea is brewing, but because they’re double walled I can still hold it even when it’s filled with steaming hot water. The tea filter is big enough to give the tea leaves a bit of room to expand, and does a great job filtering out pretty much everything solid. The lid also doubles as a holder for the filter, which means I don’t have to search around for a spare plate or something to rest it on or worry about dripping liquid everywhere. And it’s easy to clean. :)