I pretty much leak until weaning...do they work enough to hold it all in? If so I'll totally give them a shot.
They work pretty well for me. You need to pull them off and re-stick them a couple times a day, though, because one side tends to come loose from moving around, bending, and picking the kids up. You can get them new on ebay for around $19, and they last for 2-3 months. I'm overall happy with them, but if you've been wearing them for more than a few hours, it's a good idea to have a cloth ready when you take them off!