for me, the IKEA effect is a different one: it is how things look incredibly fun, nice, well-desgined when you're in the shop (because the IKEA shop is so well agenced) and just dumb when you bring one home
The fact that there are some people who enjoy walking round the IKEA stores window shopping with no intention of buying anything is testament to how well designed their stores are.
Annoyingly, I had to take the longish hike to go to Ikea to pick some furniture up a week or so ago. And it was such a mob scene that I passed on the cafeteria.
To the broader point, they do make the store something of an experience which works especially well because there are relatively few stores so it's a bit of an expedition for many people to go to one.
