I'll be going back to work soon (baby will be 6 months old). I want to build up a stock for that and make sure that I pump the maximum possible in the limited time I'll have during my working day. I have a home pump (Madella Swing) but am considering renting a hospital standard one. Can any ladies who have tried both let me know if/what differences they experienced. Is the hospital grade one more efficient or just designed to take more usage?