They work but shyt ain’t some weighted clothing stuff you’ll see like in Naruto or DBZ. You’re still training in the same gravity with the same muscles, you just added some weight and maybe decreased your range of motion and possibly TuT.
I wouldn’t worry too much about brand, especially if the shyt ain’t made in America or Europe.

Just get what you can afford and whatever has the best padding on the shoulders and waist/lower back.
Like
@Wildin said, a backpack or ruck will do the same shyt, as any military breh can tell you.
Also, be careful if you’re training on hard surfaces/concrete with one, your knees most likely won’t appreciate the extra pounds.