Honest base, I have been using it for 2 years. So far I haven't had any problems. It holds weight. The big advantage is that the bases can be screwed either horizontally or vertically, depending on the railings each person has. There is no protective included to prevent the railings from being scratched. If you want to protect them, you will need to find some soft material to put in between.

It seems good so far.
I don't know how much weight or for how long it will hold, but for a round rail I don't have many options anyway..

Don't tighten the screws too tightly because the supports can't withstand the pressure and start to sink

It doesn't hold weight, you need to make two additional rods from the bottom sides for counterweights, connecting them with the ends.

Excellent! It was installed on a 6cm railing and fits perfectly. Sturdy, it can handle the weight of laundry which can be quite heavy. I installed 3 arms with a total length of 2.2m (the middle arm was installed at 1.1m).

I have been using them for years and my experience is generally positive. Very stable, does not damage the railing, easy to install. However, after a while, it will start to rust and the paint will peel off, but it remains fully functional. If someone is handy, you can simply sand it down and apply a primer on top to maintain it. It is not stainless steel nor is it advertised as such! So everything is fine.

Relatively easy installation. It appears sturdy and high-quality. Can be placed on a railing with a diameter of 6cm, which I believe is also the maximum diameter it can "embrace".

Very good quality and stable for a 5 cm railing. It can also fit in a slightly thicker thickness if needed. I also placed a piece of watering hose between the connections for better stability and to prevent scratching the railing and to make sure everything is secure!