RERA is just a paper tiger for builder delays

Honestly, I almost got duped by a pre-launch scheme last year; saved by RERA checks. Now I'm looking at a 3BHK in Noida Extension, around ₹1.5Cr, for my kids' school. My wife wants a safe neighbourhood. I'm checking MMD Provica Homes by Uttam Steels. Builder ka track record kaise verify karein beyond RERA registration? If they delay possession, like many do in Greater Noida, are RERA complaints actually effective? Does anyone have real experience with RERA helping against builder defaults?