I use the one-piece drainable Coloplast Sensura and have just tried out the new Coloplast Mio bags. Coloplast works best for me, but not for everyone. In particular, I am sensitive to many adhesives, but have minimal reaction to the Coloplast bags (in addition to a skin barrier wipe). Also, my ileostomy itself is very wet and eats away at the flange very quickly, and the Coloplast seem to withstand that better than other brands and I can go 3 days in between bag changes rather than changing every other day like I was before that.