Noida Extension: Top builders ka post-possession experience?

Godrej aur ATS ko log itna glorify karte hain, par unki maintenance ka kya? Kids have moved out, I need a manageable 2BHK in Noida Extension. Gaursons ya ACE ka delivery track record aur construction quality kaisi hai? High-end builders are they really worth the post-possession headache? Kya lagta hai?