I got this kettle nearly a year ago, and have used it on and off, in part because I was not completely convinced as to whether or not it had some sort of protective lining on the inside. There definitely was no sort of ceramic lining like a lot of iron teapots had. What really scared me though is that this did come with an infuser basket and a little trivit/ base to use with a tea candle to keep it warm. Why this scares me is after some use the inside has started to rust ever so slightly, making me firmly believe that this is indeed unlined.
So deciding to pull it out for a day of use to compare it with my typical Kettle a Lins Ceramic kettle, the first thing I notice is how unbelievably fast this gets to a boil in comparison. Granted that even half full my Lins kettle holds likely 4 times as much water, and the clay does not transfer heat as well as the iron.
The real test though is the taste test comparison with the tea. Fist item up for a test is a matcha, and I am quite liking the effects. Either I finally hit the sweet spot with this matcha today, or the added iron really made an effect. I am finally getting that bitter dark chocolate and cream note that I have come to like so much in Matcha.