Hyderabad RERA: Is it just for show, ya kuch real help hai?

RERA is just a formality for some builders, I swear. Fed up of renting, finally taking the plunge, looking at Sattva Lake Ridge in Kokapet. Salarpuria Sattva ka RERA number toh website pe hai, but how do you *really* verify if previous complaints were resolved? Suna hai builder delays are common. If they default, RERA mein hamare paas kya real options hain? Is it actually effective ya bas paperwork hai? What key documents should I check beyond just the RERA certificate before signing anything? Koi experience share karo please.