I installed it on the yard faucet to cut the salts because the water in the area is terrible, and I wash the car with the pressure washer, and it no longer leaves spots. So it does the job. You need to let the water run well for 3-4 minutes from inside it to saturate the filter, and then it's OK. I didn't have leaks that others mention in the comments. It doesn't lose a drop.

Unfortunately, the green cap that screws on the water supply is very fragile, so if you try to tighten it well to avoid leaks, it breaks immediately. If you don't tighten it well, it leaks... I can't understand why they made it so fake.

Two stars because I don't know if it delivers what it promises in terms of washing. In terms of installation, zero stars. The product does not come with the corresponding rubber bands to make it waterproof. It is fragile and if you push it too hard, the passes break or it cracks. I connected it with my own rubber bands and used Teflon between the passes.

Completely unreliable. The green screw-on cap broke (the washing machine wasn't even in operation, you could say it was untouched, and it had distance from the washing machine) and the faucet was running uncontrollably, luckily I was home and managed to prevent the worst.

It does not screw properly onto the faucet and it leaks. I tried it on a neighbor's faucet as well and it still leaks.

I have had it in the washing machine for 6 months now, 5 washes per week, and I change the filter every few days. (Sold separately) I have noticed a difference in cleanliness compared to the washing machine, no more residues, etc. Good job. Also, to prevent leaks, use Teflon. It comes as a full first purchase