Noida flat owners, what did you wish you knew?

Just moved into Amrapali Crystal Homes. Honestly, the hidden charges at possession shocked me – PLC and EDC added up. Kisi ne bataya nahi tha! ATS, on the other hand, heard they're better with RERA compliance. But construction quality... that's the real question. Anyone else faced similar hidden costs? Or have insights on ATS construction quality? I'm curious. Hope this helps someone avoid my mistake!