Chandigarh property owners: What's your take on usable space?

The usable carpet area in new projects feels increasingly tight, even for 3BHKs. I'm currently in a 2BHK in Sector 44 and thinking of upgrading, perhaps to a 3BHK at Saini Bhawan. Their floor plans look decent, but I'm curious about actual space efficiency. Is the premium justified for the functional carpet area one truly receives? Also, what's the reality of parking allocation there?