Legal maze: New Delhi 3BHK upgrade dilemma

Vasant Kunj — eyeing a 3BHK there but the legal side is making me rethink. Currently in a 2BHK in Dwarka, thinking of upgrading, maybe a villa. Budget ₹3.5 Cr ke aas paas hai. RERA complaints — are they actually effective, ya just on paper for investors? Heard about delays with Jay Hind Apartment even with RERA projects. Title verification steps, yaar, pata nahi kitne log skip kar dete hain, but as an investor, main koi risk nahi lena chahta. What are the absolute must-dos before paying anything substantial? Garg Group jaise builders ka legal track record kaise check karein? Online reviews are confusing. Koi real experiences hain kya unke legal issues ya delays ke baare mein? Is getting an OC without much hassle even possible?