So I apologize if this was discussed previously I couldn't find much. I was wondering if anyone has experience with the Freemies as attachments to a medela pump? My job requires I take the train for three hours sometimes and I know I will need to end up pumping on the train and these looked much more ideal then the normal large pump parts protruding from me with the regular medela parts. Anyone have any experience with them? Worth the price? Do they actually work? Do they spill easily? Thank you in advance!