Gaurs construction quality can be very inconsistent

Okay I'll be honest — Ghaziabad mein 3BHK lena socha nahi tha itna tough hai. Kids ke liye Gaurs ya ATS projects Indirapuram/Crossings Republik mein dekh rahe hain. Wife ko construction quality aur hidden charges ki tension hai. Are builders like Mahagun, Shipra actually delivering on time? Any real experiences with seepage or unexpected PLC charges after booking?