I have used it before on an old computer that is extremely slow and runs windows 7. And let me tell you, it was pretty fast knowing how slow the computer is, and i liked the customization. But i couldn't get extensions because of the computer, and i couldn't visit certain sites such as soundcloud, because "this browser is out of date".
But once i got thorium from thorium.rocks, i could then use any extension i want, including ublock origin, which was banned by google.