What builders hide about long-term maintenance costs

Honestly, I thought my industry experience would save me, but this Mohali property hunt is something else. I'm looking at Mapsko Gardenia for investment. What's the *real* construction quality affecting resale and tenant appeal? I know what builders don't tell you, but after a year, do you face unexpected seepage or fitting issues? Does the snag list become a nightmare? And those 'premium' amenities – do they actually justify higher EMIs or just add to maintenance charges without adding value? I need off-the-record opinions from actual residents.