Installation:
I had difficulty with the installation, not because of the base but because I had poor wall quality (it was crumbling and I almost ended up in the next room). However, the wall plugs that came with the package were not helpful at all, they were simply bad, and I had to use my own which significantly improved the situation.

Accessories:
It comes with a lot of accessories to accommodate installation for all types of televisions. For example, mine is a simple flat-screen TV, but the back had a slight curve, so I had to combine the included screws and some other small black plastic bases to level the brackets for screwing.
I don't know if I classify this as a negative or a positive, but it was definitely a bit of a puzzle. The instructions were sufficient to give you an idea in the right direction, but overall, I had to experiment a bit (it took me only half an hour).

Overall, it is recommended - even on poor quality walls, it holds a 55-inch, 25-kilogram TV and hasn't fallen off the wall, so I'm not regretting my money (so far). I've had it for 3 weeks now.