Gaurs, ATS, Gulshan Homz: Real construction quality check?

Raj Nagar Extension projects are really tempting, but builders confuse me. My parents say always check their actual track record. I'm looking at Gaurs, ATS, and Gulshan Homz in Ghaziabad. What's the real construction quality like after possession? Plaster cracks ya seepage issues common hain? And amenities, do they actually deliver what's promised or just brochure stuff? Any real tips to check quality during site visits?