I was really hoping this design would help with leakage of castor oil as compared to other popular brands. Unfortunately this is worse. The only positive is knowing the material is non-toxic. In terms of ease of use, its difficult to get the pack on snuggly. Once its on as tight as you can get it, it still feels loose in parts. I was so excited to find a pack where I could just swap out the insert, sadly within one use the insert leaked onto the main pack, so essentially the whole thing will soon need to be replaced. I dont want to name other brands but my previous brand stayed leak free for a solid 2 months, was more comfortable and easier to put on. I'm switching back to that.