Sector 4's infrastructure claims seem too good to be true.

I'm looking at a 3BHK here, possession likely next year. Builders often promise 24x7 pani-bijli, but what's the actual ground reality for water supply in Sector 4? Is it municipal ya borewell pe depend karna padta hai? And power cuts ka kya haal hai? DG backup kitni der chalta hai? Also, are there any hidden costs residents only discover after moving in? Maintenance ke alawa aur kya expect karna chahiye? Not sure if it's worth it if basic amenities are an issue.