Okay, I've never dealt with Shamrock, but the website looks quite impressive! How do they compare to Sam's and Costco as far as quality of foodstuffs and cost?
Cheaper than Sam's in many cases.
Sam's chicken breasts are usually $2/lb, I get them from shamrock at just above $1per pound (up to 1.50). You do have to buy the 40lb box though.
80/20 ground beef is right around $2/lb in a 10lb log.