Unnati Fortune World: Possession communication worries

Builder communication during possession delays feels like a black box sometimes. My kids have moved out, so we're looking at a flat in Unnati Fortune World, Greater Noida. I'm trying to understand the possession experience there. Did they keep you informed about delays, or was it always chasing them? Also, how long did it take for the society to form and residents to take over maintenance? Don't want to get stuck with builder-run maintenance for ages. Any insights on their post-possession support for initial issues would be great. Just want something manageable, you know.