Delhi buyers, what's your real RERA experience?

Honestly, the legal maze of buying a flat in Delhi gave me sleepless nights. Just got possession of my 3BHK near Dwarka a couple months back. We were eyeing places around ₹2.5 Cr, initially just focusing on builder reputation like Kholi Group. But yaar, I quickly learned RERA registration is just the first step, not the only one. So, what are the *actual* red flags when checking RERA compliance, beyond just 'registered' ya nahi? How deep should one dig into a builder's past RERA history for delays? My lawyer found old title issues on a project near Saket we almost bought. And if a builder delays possession, RERA complaints kitne effective hain? Just on paper? Would love first-hand experiences and tips on avoiding legal traps.