LOVE LOVE LOVE LOVE (did I say I love them?) this product.
Yes, they're non-absorbant and I've had many a morning or 4 hour stretch in the beginning of my nursing (my babe's 5 mos now) where I'd leak out the side b/c my let downs were so bad. However, I can go now about 8 or 9 hours without leaking, mainly because my body's regulated itself.
I do have a little bit of a foul smell sometimes if I didn't dry my nipples off after the feeding. A small washcloth does the trick to help that. And, I've never had a thrush issue.
Another thing I really do love about these is that once your done nursing, you can wear them to hide nipple show when you want to go braless. No more little round band-aids!
I have gone braless with these, and unless the shirt/dress you're wearing has a lot of good support, I've had a few issues of them not adhering as well as they should. They are NOT 'sticky', nor are they meant to be.
They do adhere, though, but only after a while in a good supportive bra. I've heard that some people have luck going braless at night with these, but I wouldn't recommend it unless you have a very small cup size.
Swimming in them is great, too, along with working out (wash them off after working out) - again, with a good supportive swim suit or sports bra.
Don't expect miracles. This is a great product, but it still has a few flaws, but invest the 20 bucks. Mine have been going strong for 6 months now and I don't see it's end in sight.
I couldn't live without them. Period.