Gurgaon pre-launch offers: Is the risk worth it anymore?

Is pre-launch pricing really a deal or just a trap for Gurgaon projects? Builders like M3M ya Godrej promise big savings, but then construction delays aur hidden costs aa jaate hain. My last investment, I got burned. What's the real ROI on these 'early bird' schemes, especially along Dwarka Expressway? Is it ever worth the risk for a 3BHK?