If you have the polylobed breast pump is not bad and certainly better than the hand pump from Philips, but ... You really have to specifically ensure that the suction cover is securely latched to the pump was thus turned approximately 2mm below the small hooks in the lid, otherwise the pump draws too much secondary air. Another problem is the suction loss in connection of a second pump. It interrupts in this case somehow always the first cycle of the opposite side and it flows air, whereupon the pump side has already begun no longer adequately absorbed and the humblest case even licks (which is quite a mess). Furthermore, the handling is, in my opinion alone simultaneously when attaching two pumps impossible. A Helping third hand makes sense here - or else just yet pumping sequence. The third problem, which rather relates to the upgrade or individual sets, is not dense concerns of missions - it is secondary air drawn resulting in a loss of suction führt.Ich have tried to solve the problem with the interposition of a rubber band - unfortunately with little success. Overall, only buy recommendation for one-sided use without use (ie pumping successively on both sides).