RERA registration is not enough for peace of mind in Faridabad.

Greater Faridabad mein 3BHK dekh raha hoon for my growing family. Kids ki schooling, safety sab matter karta hai. Goyal Luxury Floors achha lag raha hai. Par builder ka legal track record kaise check karein? Sirf RERA registration dekhna kaafi hai kya, ya aur bhi red flags hote hain? Kya OC delay ho toh bhi possession le sakte hain? Yaar, bahut confusion hai. Please share experiences, especially about builder credibility in Faridabad.