I bought a Spectra S2, it was $259, from my local lactation consultant. I previously used an avent manual with my first two babies for the odd bottle of EBM, but this time around I am exclusively pumping so needed something suitable for long term use. I am getting similar amounts with the S2 as I was with the pump I used in hospital. I express 3-4 times per 24hrs, for a minimum of 20 minutes on each side, and I am keeping up with little Miss who has around 7 bottles of 120mL.