Goyal Luxury Floors: Is carpet area really that small?

Everyone talks about Goyal Luxury Floors' finishes, but nobody mentions the actual usable space. I'm upgrading from my 2BHK in Sector 82, eyeing a 3BHK at Rahul Mangla's project. Is the carpet area much less than advertised super area? My current home loan is okay, but I need real space for the price jump. What was your possession experience? Any post-handover surprises with maintenance charges? Disagree? Tell me why.