Price / performance / benefits ???

I have received the filter as accessories on the purchase and left for about 3 months in the machine.
Now, the question arose: what to do? Because I can not tell for the life (objectively), whether it has brought what.
I decided against the filter, because a plastic tube filled with pellets can not in all seriousness to justify this price yet.
There you will find no evidence in the sources available to me, which prove or refute a benefit.
There are only warnings of the manufacturer to use only original filters.
Thank you "Melitta" Although I trust your technique and am very happy with it, the rest I see but critical!
Therefore, I use the machine for a year without a filter, clean the tank, descale the machine to display.
And nothing happens !!!
Therefore, I give 3 stars (fifty / fifty) It should each decide for themselves whether he in 5 years the price of the machine in filters invested (13/2 months), or rather then buying a new machine ...