Re: playtex drop-ins system
I pump into the Medela bottles at work and just pour them into the bags/bottles at home at night. I have not tried to pump into them for two reasons - first, I like knowing how much is in the bottle, and that's hard to see with the bags and secondly, I think it would be easier to spill the bags while pumping.
I have had luck using the Lansinoh freezer bags as liners - so that's nice since I freeze my end of the week milk in those.
I would try to get her onto the slow flow. Maybe switch to medium and then slow. I have a fast letdown too, but I think that it should be MORE work to drink from the bottle than it is from the breast. Also, your milk is not coming out crazy fast for 4 whole ounces generally. It will come out fast for a bit, then slow down and then come out fast again.
ETA: I did have a friend at work who pumped into the drop ins and really liked them.
Lilah 10/08 nursed 25 months
Beatrix 01/11 nursed 30 months