Noida builders hide charges until the last minute

Spent the whole Sunday checking out options in Sector 150 and Noida Extension. Honestly, fed up of renting, landlord raised rent again. Time to finally take the plunge, EMI vs rent math actually makes sense now. I looked at Godrej, ATS, and Gaursons projects. Everyone talks about project delays, but what about hidden charges post-booking? Like PLC, EDC, maintenance deposits. Some quotes felt really vague. Also, construction quality? Are those display flats real or just for show? Heard horror stories about plaster cracks and seepage after possession. Planning for a 2BHK around ₹80L. Is Godrej's delivery really better than ATS? Or is it all the same in Noida? Am I just naive thinking I won't get surprised by some crazy extra cost at possession? Anyone experienced actual carpet area vs advertised super area differences with these builders?