Build aluminum balcony yourself and aluminum floor: experiences?

Hello! We originally planned to start the balcony project next year, but are now coming to the conclusion that it would be better to do it this year right after the house is finished, for various reasons (including 16% VAT). What we are looking for is a low-maintenance balcony, and we ended up with "Balkonmacher": pure aluminum balconies, often installed by the builders themselves (in our case, a cantilever balcony, so "freestanding"). I have two questions about this:

[*]does anyone have experience (directly or indirectly) with such DIY systems and would like to share about it? [*]does anyone know "Balkofloor", a floor covering made of aluminum profiles? (a bit more expensive, but very low-maintenance and durable)

I will report, maybe it helps other seekers:
"Balkofloor", flooring made of aluminum profiles, on the one hand seems good and stable (we had it in our hands), however, it does not promise 100% watertightness in heavy rain (which is important to us).
At "Balkonmacher" you promptly get qualified answers to various questions, the impression is basically good.

Nevertheless, compared to the company "Leeb", which offers complete systems, we decided on the second one: with only + 1200 € difference we get a watertight balcony, completely installed (only foundations are provided by the builder, as with all providers). A good consultation and various materials to choose from are also included.

Addendum:
In February, our 12 sqm balcony was assembled in just one day, it looks nice and we are happy with the decision made!!