Sorry I had to post and run! I'm at my folks in upstate NY and have limited computer access... I'm not sure how much more efficient. I pumped between feedings at got 3 oz on one side. When I pump to replace a feeding I get somewhere around 3-5 oz a side so to me it seemed a lot more efficient, but it's not an apples to apples compare either... too bad you can't try them out first!
Re: ***taytee***