BWT Bestmax Premium size 'M' Cartridge

My old filter was letting through a weird metallic taste, but this cartridge makes my morning coffee smooth and clean again. The size M fits perfectly in my standard countertop jug.

Finally got my water taste right for morning coffee; the cartridge was easy to install and the change in mineral balance is noticeable. My tea has a cleaner finish now without that flatness.

The installation was straightforward enough, but I'm not sure I notice a huge difference in my coffee's taste compared to just using filtered tap water. It does seem to last the claimed number of refills, which is fine.