Emma/Eliz,
Medela's single and dual pump cannot make it. Must get the most expensive electrical one which is the one that comes with the back pack and other accessories (cooler bag, battery compartment for outdoor use, etc). I have the single electrical but used 2x only. Cos very pai che after using. But hor, frankly speaking, it's not worth the investment unless want to bf for a long long time.
TMC's lactation consultant Mrs Wong told me previously that there were some prob with Ameda. I remember they were using Medela (the latest model which I don't like) when I visited her 2 yrs ago.
Emma/Dymples,
You may want to call Mrs Wong and check with her on the prob. Keke. . but she may have changed her opinion after 2 yrs.