I'm still using WB and liking it, but Jaffa seems a bit wary of the smell. He will use it but I think he is a bit wary and sniffs around the tray a lot before going in it. Fingers crossed he gets used to it. I think it's because there is now a lot in the tray. I initially added a little to what was left ot the cats best and then made sure that what was left in the tray was predominantly WB before emptying the tray, washing it and filling with WB. He was fine with it when there was only a small amount, but now he doesn't seem too keen onit.