i havebeen a member of costco for abour 7yrs now.. No they DO NOT accept Man Q's UNFORTUNATELY!! But.. I say but...Costco is totally worth it! Their coupons are great and the most best of all the quality is just not enough words to describe! Comparing Costco to Bjs (I am also a member of it) and to Sams club.. Costco just beats them down with one hand behind thier back!