Kirkland Signature is reliably great, especially in comparison with other store brands. I’m a bit of a Costco fanboy though, in full transparency.

My partner and I used to argue over who gets to make the monthly Costco run but now we just make it into a big family outing (Friday evenings are an amazing time to shop there).

The vast majority of the time the store brand is manufactured by one of the competitors anyhow.

I don't really have complaints about store brands in general, I think the quality I see is par for the course for non-high-end brand-name items, especially for non-food items (where some are better than brand name or white labels of popular brands, but the average quality seems lower).

I have had good experiences with Amazon Basics and Amazon's clothing brands.

Around here (Ontario, Canada), Loblaws "President's Choice" and Metro "Irresistibles" are good. Both chains have a lower tier of branding, "No Name" for the former and "Selection" for the latter. Agreed that Costco's "Kirkland Signature" is reliably OK.

Kirkland is great. I've also found Target's generic brands to be fine for many basic items.

Sure. Sometimes they're better than brand. When price is no issue, my basket will be a mix of store and name brands.

Amazon Basics is top quality.