Noida builders' delivery timelines are pure fiction, right?

Sector 150 – everyone keeps recommending this area for a 2BHK ya 3BHK. I'm looking for my first flat, budget around ₹80L-₹1.2Cr. Godrej, ATS, Gaursons ke projects dikh rahe hain. My main concern hai on-time delivery. Parents bolte hain builders bohot delay karte hain. ATS ka track record kaisa hai for actual delivery dates? Aur Gaursons ki construction quality, especially after 2-3 years, कैसी रहती है? RERA compliance bhi important hai. Bohot confused hoon, any honest experiences from residents for these builders?