M.M.
I have the Medela Pump in Style and I really liked mine. If you pump right after you breastfeed you may get different amounts each time. In my experience w/ pumping I didn't feel like it was getting all the milk out either. Then I found out that pumping doesn't get all of the milk, you have to use a combo. of breastfeeding and pumping.Because the baby's suction is what truly empties the breast. If you are doing this and still have problems, I would recommend pumping more freqently until you go back to work. It's all about supply and demand...hope this helps! Above all don't get frustrated.....thousands and thousands of babies (happy and healthy) are bottlefed w/ formula every day! :<)