Excellent base. Very good construction quality, emphasis on detail. It even provides self-adhesive sponges to prevent scratching the back of the TV. The most important thing is that when you install it, it offers adjustment for leveling the TV, even if it has been slightly incorrectly screwed to the wall.
Very stable and precise in its movements, it does not lose its stability no matter how many times we play with its settings (a common phenomenon with cheap Chinese ones). Solid and beautiful.
The only negative is that it requires assembly. Not something difficult, but it can be discouraging for some.

For me, even though it is expensive, the result it provides is worth it. You buy it once and you can relax.

P.S. I am a professional installer.