So I only just finally used this, though I ordered it months ago. I have a low milk supply and just assumed this wouldn't provide enough suction to be worth it nor did I think it would work well - I ordered it based on the recommendation of my LC, but just stuck with pumping instead of trying it. Boy do I regret not trying this sooner....It's helping to raise and maintain my supply, I just pop it on and go about doing whatever I need to do. It definitely doesn't have the suction of an electric pump, but I am amazed at how much suction it does have. And the ease of use, hands free, plug free benefit is awesome. Great for using in the car on road trips as well!