RO7 reverse osmosis - Brand selection, workmanship, filtration

Hello, recently I've been talking about reverse osmosis for about a few days.
I have to install such a set in the kitchen (block) due to the amount of limescale and chlorine present in the water.
There are many sellers of such sets on the market, and thus even more sets marked with the same RO7 and with a different configuration of filters, their different manufacturers and degree of filtration.
Analyzing it on the market, I would choose one of the ones proposed below.
Links on alledrogo because not everyone has their own website. It is not about the price or the fact that the set has additional filters or not, but about the quality of the obtained filtration and mineralization.
If you have more experience with one of the sets, something is better, please give a short advice on which set to choose.

3.1.18. Do not send links that will cease to be active after some time. This will make the discussion meaningless.
[Retrofood]

I have something such a and a friend too - we are satisfied. It is important that the filter tubes are transparent so that you can judge the purity of the filters yourself.

Hello
If you are considering installing an RO and writing about descaling, first you need to find out how hard your tap water is. Osmosis also has some acceptable input water level. If the hardness is too high, it may be necessary to install a softener. As for the ROs proposed by you, unfortunately I will not say anything, I have Puricom Stella installed and I am not complaining. The presence of a "rack" in which everything is mounted was important to me. There are also drop testers for hardness testing.
best regards

As for water hardness, I did not check it in a professional manner. Strips were added to the pressure coffee machine to check the water hardness, and on this basis, the menu is set and the machine itself notifies you about the frequency of filter replacement and descaling.
On such test strips, I have roughly half of 4 units, the hardness is between 2 and 3. The paper test certainly leaves a lot to be desired but I checked several times and the readings are at a similar level. In general, the stone is mainly precipitated in the kettle, a man bought a glass kettle and he can see how much there is when there was plastic, and the awareness was smaller as there was a stone in the water.
I believe the water is ok for filtration. I also checked the Stella, talked to a consultant and the sets are more expensive and similar from the description (I can't judge because I haven't seen the quality) but the frame does not need such a standard set in this assembly, which they propose is completely sufficient.

I have water from my own intake and it is very hard, so I put on a softener. On it, I set the initial water hardness to about 90 mg CaCO3 / l. With such hardness, the kettle had to be cleaned once every 3-4 weeks and on the top of the tea glass there was a "greasy stain". After installing the RO, the kettle's heating plate looks like the kettle was bought yesterday, the water is like crystal and there is nothing on the tea. My mineralized water has a hardness of 5mgCaCO3 / l. Before the RO, I recommend installing a separate filter, eg 25 microns, so that in the event of any larger "contaminants" in the installation, the RO filters should not be clogged unnecessarily. The drop tester can be purchased for about PLN 30, or the water hardness can be found on the websites. I bought the Stella RO6 due to the promotion and so far I'm satisfied, I replace the filters once a year.
best regards

Thanks for the replies in the topic, now just a choice.