Breast pump... medela or spectra?!

Tori

I'm undecided on which breast pump to choose. I've narrowed it down to two but can't decide. Does anyone have anything to say good or bad about the Medela starter or the Spectra S2? My insurance covers both I've just heard good things about both of them! It also covers the Megna M7 but I haven't heard anything about that one.