It was the first one i tried (I did not like it) i have seen them on the hook at supply house for several years, but know no plumber who has tried one. The one i used was green, don't know the brand as the homeowner provided it. Others may be different, if the flange is at the proper height, meaning just above or at least level with the floor, you can not go wrong with a wax ring, if a little lower you can get away with a jumbo wax ring, and a roll of plumbers putty, other then that a tile riser ring, or redo the flange. (those new foam rings may work, just had no luck with the one i was given.) And a crack in the bowel, will leak no matter wax, or foam, you just must have got a good seal the last time with the foam.