I can't decide between two breast pumps. This is my first baby and I plan on breast feeding but will need to pump when I go back to work. My insurance will cover 100% cost of the Spectra S2 or I could get the Medela but would still need to pay $95.00. The Spectra has the Backflow protection which is my main intetest in it, plus I read it's really quiet. However, I read the Medela may have a stronger pump to pull the milk. Plus Medela parts and pieces are sold at a lot of stores. If I needed something from Spectra, I would need to order it from the manufacturer. Has anyone tried both What are your thoughts?