I was going to reply to Ruth Sweet about this, but saw another comment today so maybe there are more LCs with this experience. When the selects came out, I ordered a couple and had a couple nurse-friend-moms "test drive" them...discussed the idea of variable pumping speed as an aid to getting MERs, both initially and throughout pumping session; better supply while pumping. I think I had 3...two who had used lactinas previously, and one more familiar with classic. All three stated that they felt there was no advantage and perhaps less suction; in any case they all wanted their "old" pumps back. I returned the selects to the company with my feedback and got response (lack of) that implied I was isolated in being dissatisfied . Over the past 15 years as neonatal RN, 8 as parent child clin, spec and 3 years as LC/pump rental station, I still consider the classic or Egnell's equivalent the gold standard.--Phyl