Site visit secrets builders won't tell you

Okay I'll be honest — I completely underestimated how confusing this process is. I'm looking at properties around Kondapur Main Road, like Salarpuria Sattva projects, aur site visits pe jaa raha hoon. But I feel like I'm not asking the right questions. Builder sales log sirf positive cheezein batate hain, obviously. What are the actual things I should be looking for during a site visit, especially for an under-construction flat? Matlab, construction quality kaise check karein? Yaar, common areas, amenities, water supply... these small details. Koi tips hain kya jo builder kabhi nahi batayega? What did you guys check jo baad mein kaam aaya? I need help with a solid site visit checklist. My parents keep saying 'jaldi mat karo', but I need to shortlist. Any red flags to watch out for?