Knowledge Park Greater Noida 2BHK: Any hidden costs people faced?

I work in real estate but buying for myself is a whole different ballgame, honestly. Even after knowing the tricks, I'm genuinely frustrated with the builder games and hidden costs they try to sneak in. I'm looking for a 2BHK in Knowledge Park Greater Noida, around Zeta II, budget ₹80L-1.5Cr. Brochures mein sab achha dikhta hai, but actual ground reality kuch aur hoti hai. Super area vs carpet area ka game, phir maintenance charges, PLC... dimag kharab ho jaata hai. Koi bata sakta hai ki kaun se projects mein transparency better hai? Ya koi builder jiska track record sahi ho is range mein? What's the real total acquisition cost logon ko pad rahi hai? Any specific red flags ya RWA issues jo face kiye hon? Honest, off-the-record opinions chahiye. Don't want to get stuck.