The teapot itself is very nice. The infuser works fine. The pour hole is also big enough for paper filters and the top holder (size M) if you don't want to use the infuser.
A drop of bitterness is the lid. It is just made from oak. Over time, condensation collects under the lid, which then drips down as the tea is poured. I would recommend to place a thin, food safe silicone ring inside the lid.