Ordered these as I was paying a lot of money for breast pads due to overproducing.
You see how much milk you actually waste leaking into breast pads! In one day I managed to collect almost 10 ounces (a great thing if you're aiming to build up a stash for returning to work or for other family members to help out when you want a break)
If you're anything larger than a C-cup I'd avoid buying these. Being larger busted (I'm an H-cup) I found these uncomfortable and difficult to get in the right place. Add to that they don't really seal themselves around the nipple so leakages are a high possibility. They also don't really hold more than an ounce before they start to spill, you have to sit up almost perfectly straight to avoid spillage which isn't very helpful for those with an over active letdown and find feeding more comfortable in a more reclined position. They're also REALLY visible under clothing so only something I'd wear in the house and CERTAINLY not outside!
Overall I'd recommend these IF you plan on collecting milk in addition to pumping to build a stash or bottle feed breastmilk, otherwise, much as I hate saying it, you're better investing in some decent reusable breast pads and using them.