RERA compliance: Is it just on paper in Gurgaon?

Is RERA registration just for show, ya builders bypass it somehow? I'm looking at a 2BHK near Dwarka Expressway, budget around 1.5 Cr, but my parents keep saying check builder's legal track record properly. Paras The Manor mein delays kaafi sunne ko mile hain. Builder-buyer agreement mein itne hidden clauses hote hain, I had no idea. Agar builder late kare toh RERA mein complaint karna effective hota hai kya? Yaar, bahut nervous hoon, yeh meri first property hai, ab samajh nahi aa raha.