A lot of misinformation from the photos.
1st store order sent a different product even though they knew they didn't have it
2nd store sent the same but not the model shown in the photos (obviously they didn't know)

Overall, an average product, its accessories are fake (nipple, spiral) and you will need to replace them.
The filter case is of mediocre quality, most importantly the socket where the nipples screw in is plastic and not metal as shown in the photos, resulting in leaks no matter what you do! There are better options at this price with a metal thread.

Very good value for its price and indeed the product I received did not have a decompression rubber, which is better because it's one less point to fail (it decompresses from the small tap). It was connected to the supply with a 1/4 quick coupling tube and with a good tightening on the fittings and plenty of Teflon, it hasn't leaked a drop. Attention for those who want to get Eiger match-match filters, they do not have NSF certification, not that they are bad... that's what I used.

I connected it with a pressure reducer so I don't know how much it can withstand the network pressure (I'm not risking it), but it seems to be of quality construction with quite thick walls (unlike some transparent and thinner ones I had bought earlier that cracked immediately - without a reducer back then...). It includes the necessary connector to join the two containers, has metal threads but not a water release button as shown in the photo - though that's not really necessary since the faucet switch on the counter will do the same job.

A professional plumber struggled for 2 hours to install it because it was leaking… the filter is not the one in the photo. It comes without a pressure relief button. Overall, mediocre build quality.

For Athens, it is convenient as it prevents rust due to old installation. The 'invisible' ones... if they exist, they are fine. No pressure drop, no taste alteration (eiger activated carbon filter)

Combined with the eiger filters, it did the job in the village. The first one held sand (completely changed color within 2 months of use so I change it often) the second one cleans what you don't see. I consider filters necessary everywhere now.

I do my job. But I struggle excessively to make it not have leaks from the water inlet and outlet. Also, in the photo it shows that it has a release button, while in reality it does not have

Unfortunately, the device I received did not have either metal bolts or a decompression system. It seems that the discounts on materials have started... The device is okay otherwise, but I definitely would not choose it again.

Very good value for money choice without reducing the water pressure. I bought it as a set together with its filter!

Very high-quality construction with metal bolts and a water release button for filter replacement.

For now, it has no damage and the water release system helps a lot in changing filters. It seems to be a quality construction.

Device that I bought along with the filter of the same company with carbon. The filter is what does all the work but the device is fine. I tried to install it myself but unfortunately I don't have the knowledge with plumbing so I incurred a small cost. The water has at least 3 times better taste than before and does not smell like chlorine