I love this teapot--I bought it because the cast-iron teapot I've been using for years is finally just too small to deal with my caffeine addiction. I haven't really measured the full capacity, but I fill it to about a quarter-inch from the lid and that ends up making roughly 1.5 liters (at least according to the measurement marks on my electric kettle, which I also haven't measured for veracity, so take that with a grain of salt I guess). I don't put my teapots on the stove to heat water in them, though the instructions indicate that you could if you felt brave enough. Instead, I pre-heat the pot by swishing a little bit of hot water around in it for a minute before pouring that out, measuring in my tea leaves, and pouring the boiling water over the top. It stays hot for a good bit by itself, but not really long enough for me to plow through a liter and a half of tea before it goes cold. But herein lies the beauty of a cast-iron pot: setting it on candle or some other kind of warmer (I have a cast iron candle-holder for this specific purpose, which came with my old teapot). With an outside heat source to keep it going, it stays hot for hours. Without, it's hot for around 30 to 40 minutes, so if you're making tea for two or more people that will probably be long enough to enjoy about a few cups apiece without it going lukewarm.

The enamel interior is easy to clean (just swish some boiling water around in there and dump it, then dry it with a soft cloth to be on the safe side) and the design is absolutely beautiful. My only complaint is that it's hard to get the brew basket out of the teapot opening; it lays completely flush to the rim for the lid, and to save myself burning the hell out of my fingers I've started using the thinnest edge of a metal spoon to lever the basket up enough to get a grip on it. You could just leave it in until you've emptied the pot, if you're less of a wuss about over-steeped tea than I am.