That being said Lucky Plaza food is pretty bad, I only included it because of the underground walkway that theoretically "joins" it to the Orchard complex. Since it is technically my neighbourhood, I usually prefer going to ION's B4 food court or Wisma. But Lucky Plaza does have Iris, AFAIK the only true bespoke tailor in a building riddled with the "overnight Batam job for $200" types, so an ION resident could be coming over to check on his Loro Piana cashmere dinner jacket's progress.
I think Suntec is the one that shocked me the most when I first arrived, I got lost around the (now defunct) bowling place enough times to systematically use Google Maps until I learnt the corridors, because they don't meet at right angles. It's kind of amazing to have to think in 3D when you are used to navigating 2D streets...