Noida Extension builders: delivery and quality worries from Dubai

Kya real scene hai with builder delivery timelines in Noida Extension? I'm based in Dubai, can't do site visits easily. Looking at Godrej, ATS, and Gaursons projects, especially near Sector 150. Brochure mein toh sab acha lagta hai, but how often do they actually deliver on time? And construction quality post-possession ka kya haal hai? Heard stories about seepage. Also, customer support after booking – do they even respond to NRIs? Need honest ground reality, please.