Under-construction possession timelines are often a huge trap for families

Sohna Road area keeps coming up every time I shortlist something. For our growing family, I'm looking at Signature Global Park 1. But I've heard under-construction projects often face big possession delays, affecting kids' school admissions. Builder trust factor for timely delivery is a huge concern. Is it worth the gamble, ya ready-to-move hi lena chahiye? What's your experience with actual delivery timelines?