MR - I have had GW success with Macys.
Thing is, even if your GW is not accepted - or if you don't receive any reply at all. DON'T QUIT !!! Wait 30 days, or so, and then try again. After you have done a couple, you can knock out a GW letter on a minute or two.
Keep the GW's flowing. If your 2nd GW is not accepted - try again. And again, and again.......... eventually, the chances are your GW will be read by a receptive csr, and you'll be successful.