I have been using these metal cutting discs for years. I have tried others from different brands, but these not only cut quickly, they also don't catch on the material, resulting in a smoother cut. However, this also means that compared to others, they wear out relatively quickly. Personally, I prefer to work with safety and quality rather than saving 10€ and struggling.

It seemed good to me, I cut a square profile just fine, neither before nor after did the saw have any vibrations.
Now, as for durability and if they break, we will see.
It's Dewalt, relatively expensive, but I bought them because they are only 1 mm (I measured them with a caliper) and I liked the metal case, it also has a hook to hang it!! Hahaha!