We used to emphasize that you could buy a computer with us and go home with it today, whereas down the hall, you could buy it but it would come in the mail later. Their store had demos and the big cow-patterned boxes around, but no inventory.
Also around then, I applied for and got a Gateway-branded, Holstein-patterned credit card, which I promptly maxed out to buy my own first modern computer, a P2 build not from Gateway, but from Midwest Micro. I learned Red Hat Linux on it, reading the manual on break at work even before the computer came, and it began my real career.
So lots of adjacency to Gateway, but no real firsthand experience. They were definitely a force.