Del NCR Infra ka pre-launch offer in Sector 155, kya opinion hai?

Del NCR Infra ke pre-launch offers Sector 155 mein sahi hain ya bas hype? I'm looking to upgrade from my 2BHK in Noida Extension to a 3BHK. Builders construction-linked payment plans pe bohot push karte hain, but super area ka calculation samajh nahi aata. Is it better to wait for ready possession ya pre-launch mein risk lena worth it hai? Already home loan chal raha hai.