I have to be the rebel and break the chain to say I absolutely LOVE my Convatec Convex Moldable.
Along with stoma powder, Cavilon spray/wipes, a whole Eakin, Sure Seals and a diligent heat & pressure application, this set-up has proven to be bomb-proof for me. I also use All Care Adhesive Remover wipes.
Some don't advocate the use of powder and barrier spray/wipes, but I have never had any issues with them and use them at every change .
I know there are lots & lots of folks who get great results with Coloplast, but it just won't stick to me, even without powder and a barrier.