The only difference I noticed is the reduced amount of salts in the bathroom. Indeed, as some other users say, it didn't change anything in the flow, but the water is definitely filtered

The water in our area is terrible of course and I somewhat understand it, but neither me nor my girlfriend have noticed the slightest difference. What surprises me is that the flow of water doesn't change at all with a filter or without anything, which makes me wonder if the water is actually being filtered or not.

The only negative is that it only catches the water coming out of the phone and not generally the whole faucet

Easy installation, just unscrew the phone and put it in front. The only negative is that it adds minimal weight which is not a big deal. I have noticed a difference in the dullness left by water on the enamel of the bowl and the faucet battery

Quite an economical choice. It was placed right before the hose on the phone, which limits you as if you want the water to be clean and without salt, it doesn't work when the water is running from the faucet, so essentially you have to wash with the phone

Very easy installation between the faucet and the hose. It doesn't bother at all. It's as if it doesn't exist