I use the flex, and LOVE it. It is very secure, I have never had it un-attach. It is so much smoother under my clothes. Highly recommend you try it.
Dx Mild Proctitis 7/06 at age 33, Dx Severe Pan Colitis 5/07, Dx Crohn's Colitis 10/07
Failed Asacol, Lialda, 6-MP, Canasa, Rowasa, Proctofoam, Entocort, Remicade, Humira
10/10/08 colon removed, temporary ileostomy
11/10/08 FINALLY off prednisone after 18 months
2nd of 3 surgeries planned for '09 to form j-pouch