I've tried the Haakaa Ladybug milk collectors and found them pretty handy for collecting letdown milk. They're quite comfortable and do fit well under clothes, which makes them discreet enough for wearing out. They tend to stay in place, though I'd recommend checking your fit and ensuring they're properly positioned. It's a good idea to empty them frequently to prevent spills. Overall, I've had a positive experience using them throughout the day. How has breastfeeding been going for you so far?