I have a pair of Lily Padz. I use them for special occasions. I love them - No leaks at all, and no movement. Even after a let down after a glass of champagne during a wedding, no milk came out anywhere, they apply a lot of pressure over the nipple. Very comfortable - I have even worn them under a strapless dress without a bra.
These are great to wear to bed, too. They say they can be worn continuously, but I've never tried.