My first home in Noida: So many questions

Is full flat power backup in Jaypee Krescent Homes actually reliable, ya common areas pe hi khatam ho jaati hai? I'm looking at a 3 BHK there, and marketing brochures toh sab achha dikhate hain. But I've heard stories about power cuts aur generators jo bas lifts aur lobby chalate hain, which is a big concern for day-to-day living. Water supply ka bhi tension hai, Noida mein kaafi jagah summers mein tanker dependency ho jaati hai. Kya Krescent Homes mein tank capacity sufficient hai, ya society ko tanker bulana padta hai? Aur elevators ki service kaisi hai? Kabhi stuck hue ho, ya maintenance response time theek hai for breakdowns? First property hai, toh thoda nervous hoon, ab samajh nahi aa raha kaunsi info pe trust karoon. Any real experiences, please share.