I had their Pale Ale just last week.
I found it to be "ok". Nothing really remarkable. Had a nice aroma anyway.
Seemed like it might have been slightly oxidized though. Got a hint of cardboard in the taste.
The can listed it as being made by some brewery in California (didn't recognize the name).
I think Costco hires out different breweries across the US to produce their craft beers. This likely results in a fair amount of differences between the different stores. Wish I would have seen this thread a month ago. Could have saved your taste buds from an assault of mediocrity. Much like alot of the kirkland brand, its a cheap knockoff of a quality product produced at the lowest possible cost.