is NCUnlock legit and safe?

recently i made a post about unlocking the bootloader on my poco f6, and some people recommended a paid service called NCUnlock, now my questions is whether they are safe and legit or not? what makes them so special, i mean old exploits exist what makes them do it so easily, i am ready to bite the bullet pay the 50$ and get this over with overall it is still cheaper than a pixel with better performance, but does this have any chance of bricking my phone? i only mean the unlocking process done by NCUnlock, im aware that flashing the wrong files or the wrong recovery can brick the phone this is not my first time