Vasundhara buyers: Pre-launch offers or wait?

Vasundhara keeps coming up every time I shortlist something. Honestly, I'm so fed up of renting; landlord hiked rent again, so I'm finally taking the plunge. My budget's around ₹65-70L for a 2BHK. I'm looking at SARE Homes, they have some pre-launch offers right now. Is buying at pre-launch actually a good deal in Ghaziabad, or do prices not really change much later? Sometimes it feels like they just inflate the initial price. Also, what about payment plans? Should I go for a construction-linked plan or try for a bigger down payment? Which option works out better for end-users like me? Any experiences with this in Vasundhara would be super helpful.