Post-booking blues: Do Bengaluru builders ghost you?

What's the real deal with builder communication after booking in Bengaluru? I'm looking at a 2BHK near Sarjapur Road, maybe something from Prestige or Godrej, around ₹1.2 Cr. My parents keep saying check builder ka track record beyond just delivery dates. Kya experience raha tumhara once EMI start ho gayi? Do builders like Sobha or Brigade actually keep you updated during construction delays, ya they just go silent? Honestly, bahut tension ho rahi hai. Also, RERA compliance kitna important hai? Are there any hidden legal issues with builders like Puravankara or Embassy that one should know? Need some real gyaan, please. Hope this helps someone else too.