Upgrading to 4BHK: My carpet area reality check

After 2 site visits to DLF Siris Estate, I'm wondering about the actual carpet area efficiency. For ₹7 Cr for a 4BHK, I need good usable space for my growing family. Builder brochures often show super area, but actual carpet area efficiency dekhna bahut zaroori hai. Siris Estate mein kids ke school aur daily commute ka kya scene hai? Community vibe kaisi hai, friendly for families? Noise levels Gurgaon mein bahut hain, yahan kaisa hai? Yeh carpet area check small lagta hai, but makes a huge difference for daily living. Any residents share experience?