Noida Extension downsizing — any insights?

Downsizing in Noida Extension feels more complex than buying our first home, honestly. Kids have moved out, so I'm looking at a compact flat, maybe in Pinnacle Neelkanth Villa or Contour Sukhbiri Estate. Builder ka track record kaisa hai in projects? Total cost of ownership, including maintenance, kitna padega? Hospital proximity is important. Any advice on these projects for a peaceful retirement?