tell me all about freemies!

S • ‘16 MC, ‘17 boy, ‘20 boy
First of all, do they work with medela pump in style advanced pump?
Will they fit with small breasts?
Please just tell me all about them and your experience with them. Don't want to drop a bunch of money on them if theyre not worth it. But I'll be pumping a lot next month while my LO is in day care so I'd like to pump handsfree without cutting up bras