Rudraa Aroma: How real is the 'full backup' promise?

Full flat power backup is such a marketing gimmick sometimes. I work in real estate but buying for myself is different, you know? Looking at Rudraa Aroma, they promise 100% power backup. But what's the ground reality for actual residents? Is it truly full flat, or just common areas and a few points per flat? Honestly, that makes a huge difference. Also, how's the water supply there? Tanker dependency is a nightmare I can't deal with. And are the elevators reliable? Need honest opinions, off the record. Brochure vs reality, you know?