This is the location I went to during university and the beginnings of young adulthood. It's a great location, recently made more popular by the Ikea Monkey.
The location is large, but there are always tons of people. It's unavoidable. In other cities I've never seen an Ikea so crowded.
On this particular trip my mom purchased a kitchen sink. We had to pay at the register, then wait for them to retrieve it from the back. This is different from the normal pick-it-up-yourself model that we're used to at Ikea, but since it was a sink that's how it is.
We waited in line to pay, then waited again for about half an hour while they retrieved the sink. My tip would be to get the sales associate who prints the sales slip on the showroom floor to call down your order so you don't have to wait quite so long to pick it up.