May be written here about compatible alternatives to LEGO Technic?

As a child, I was thrilled by the LEGO Technics sets. Especially 2-in-1 or 3-in-1 sets. While looking for Technic sets for my son, I found that this range went in a direction I didn't like at all.

• Either it's way too simple and has little to do with Technics (one, or two small technic functions).
• Or LEGO technics is way too expensive, only for the showcase and without a B-Model (no 2-in-1).

As an alternative, the name "CADA Master" or "Mould King" often comes up.

• Does anyone have positive experience with these alternatives?
• And is it allowed to write about it here?

@ Here a small mousetrap tinkering, which I built last week with my son. And the first test, if I can share a moving *.gif here in lemmy.world.