Selling big home, finding peace in Greater Noida

Resale of my existing property is almost done, now the real hunt for a new place in Greater Noida has begun. Kids have moved out, so don't need such a big place anymore. Looking for a manageable 2BHK ya 3BHK in Noida Extension or Sector 150. Main concern hai construction quality aur long-term maintenance. Suna hai Godrej Properties ka finishing acha hota hai, but ATS aur Gaursons ke projects mein post-possession charges ka kya scene hai? Word-of-mouth reputation kaisa hai for Mahagun ya ACE Group? Want something jahan society well-maintained rahe, no hidden costs. M3M India ke baare mein kuch idea? Hospital access bhi important hai. Is it worth paying more for builders like Godrej ya ATS for better quality, ya baaki bhi theek hain for an end-user? Koi specific project recommend karoge for a peaceful life? Any experiences with post-possession issues? Share your thoughts, please.