The seat seems decent enough quality for the price and the fittings seem very sturdy but I did have a couple of issues which made me decide to mark it down a couple of stars.
1) The sizing is not quite right, the image says 35.2 cm wide, it replaced a toilet seat which was 35 cm wide and fitted perfectly whereas this comes up short by by a little over 1 cm meaning it doesn't quite cover the toilet bowl. If your existing seat is around 34 cm wide then this would likely be a much better fit. The depth is also off by about the same amount, even using the rear holes so the seat is as far forward as it can be it falls a little short and leaves part of the bowl exposed, it's more like 42.6 cm max than 43.6 cm.
2) The small plug parts that go into the holes in the toilet are slightly too wide, I had to modify them with a Stanley knife to make the seats hinges sit flush on the surface of the toilet. Really they should either supply a couple of size options or make the plastic "fins" around them slightly more flexible.
The back of the seat also showed a couple of slight defects where the plastic was formed but nobody would really notice those once the seat is fitted.
It's ok for now given that it's better than no seat at all and I can't exactly pop to a hardware store easily under the lockdown but I will have to replace it with a better fitting one soon which is disappointing.
A little over twelve months on and the seats hinges are totally failing. A white and blue powder started appearing around the hinges every time the seat was used, which got worse over a period of weeks, now the hinges will no longer sit flat no matter what I do. Basically the quality is far lower than it first appeared, I definitely would not recommend this seat to anyone.