Even at 0.5 attempts per second (so 1 per 2 seconds) will get you ratelimited and eventually probably IP banned so it's like the most useless tool out there... but that goes for any type of "bruteforce" method of aquiring these kinda stuff.
It's currently set at 0.25 attempts per second.
Anyhow, I guess if you're feeling lucky, please do try it!