Vasant Kunj Enclave: First-time buyers, what did you miss?

Vasant Kunj Enclave — been looking at this area, but honestly bahut confused hoon. V.K. Probuild ke projects bhi dekh raha tha. Pehli baar property le raha hoon, toh kya cheezein pakka check karni chahiye? Log bolte hain bahut hidden cheezein hoti hain. Kaise shortlist karte hain aap log? Any red flags ya tips for first-timers?