Gurugram mein RERA aur BBA clauses kaise verify karein?

15 din ho gaye legal docs check karte karte, ab samajh nahi aa raha kya sahi hai. MRG World ke Suncity Vatsal Valley mein ek independent floor pasand aaya hai, first time home buy kar raha hoon toh thoda nervous hoon. Builder-buyer agreement mein kaafi clauses hain jo mujhe favour nahi kar rahe lagte. RERA registration ko properly check kaise karte hain Gurugram mein? Aur agar builder delay kare, toh RERA complaints sach mein effective hote hain ya bas paper pe hi hai? Experienced log please help karo.