Noida's 'full power backup' claims are mostly a joke

I'm eyeing a 2BHK in Capital Athena for investment, and the sales team promises 24/7 full flat power backup. But my friends in other Noida societies say it's always just for common areas or limited points. This really affects tenant attraction and resale value, doesn't it? If someone's paying good rent, they expect basic services. Also, what about water supply? Is it reliable or are tankers a common sight? I'm worried about long-term maintenance costs if these basic utilities aren't up to scratch. How do you even verify these promises *before* buying? Any red flags to look for during site visits regarding these utility aspects?