Johnny in L.A.
Knows what a fatty is.
...I have always found their "Prime" to not quite be on par with other local maybe "higher end" grocery store Prime steaks.
Me, neither. I much prefer our local grocery store that has a great meat department. I buy the prime Costco steaks much of the time because they're cheaper. But I think I'm done with them. I'd rather do more low-and-slow and eat better steak less often.
Local market (and look at how they trimmed them!):
Costco (I cooked two of these so far and they were just "ok"):