I always order with splenda, and I've never had a bad tasting order from the protein factory.
I just got some orange flavored milk isolate last week. The flavor is good, but the damn stuff gels up like paste when mixed with water unless I dilute it quite a bit (the caseinate I suppose?)! Anyway, I found that mixing one scoop with 12 oz of crystal light or sugar free tang makes for a damn fine orange drink! A very welcome change from the chocolate/vanilla doldrums!