Everything is convenient: the filter for loose tea or tea (I'm mixtures); or even for bags (3 and 2 even sufficient). At first I found the filter piston difficult to press, but s' used quickly. This system allows stunned to know that when the piston is at the top, we must think of it down, and then the leaves are not macerated in water cooled as with a simple filter when you forget to remove the leaves. The filter and the piston can be easily removed, and the shape of the teapot without neck, but with a single spout, allows to clean very quickly and completely. The plunger cover is well suited to the spout of the teapot and easy to pour liquid. And the glass is much stronger than my previous teapot.