As with all water filtration systems also applies to the sonorous "Intenza +" baptized cartridges: A lot of money for a little plastic and some activated carbon and traces of silver. What is really annoying: the machine "believe" that they get with lime-free water cartridge. But this is not so in areas with hard water. The cartridges reduce the limescale content neatly, but not 100%. Thus then the espresso machine calcified gradually and you will not be warned.
Bin strayed from the use of Kalkfilterkartuschen. I now descale every 4 weeks (on request). The machine it is gorgeous, the coffee tastes OK, I save in more than 100 EUR ...