I used them regularly as we get a bulk buy deal direct from them with the local club and never noticed any drop-off compared to the Lallemand or Fermentis equivalents. Mainly use Einstein (34/70), Bond (S-04, I think that name has now changed), Old English (Nottingham), and LAX (US-05). I did prefer Hoppin Pils over Einstein for lagers but they've discontinued it recently and I'm down to my last few packs. Their Kolsch yeast Bier Bitte seemed to disappear around the same time Lallemand Koln did too.