The lounge was probably half full when we went. After ~6pm, it got pretty quiet. It had more seats than I anticipated. There is an isolated area off to the right which remained fairly empty the whole time I was there.
I don’t normally drink, but the self serve alcohol section must be dream come true for many. The food selection was quite decent (pineapple fried rice, teriyaki chicken, Asian cole slaw, veggie soup, salad bar, cold cuts and cheese, desserts), pretty much on par with SLC. They also kept replenishing the buffet well. The view of the atrium all the way down to the sky train platform is pretty cool, too.
I think this small Sky Club packs a punch, although obviously my data points are extremely limited.