Eng I'm using the Medela Swing and I'm exclusively expressing for my DD in NICU. Have been for almost 50 days now, so its getting a workout! Its been great, I wouldn't hesitate to recommend it to you. I *thought* I would prefer a double kit too but couldn't bring myself to spend the money but I'm glad I've got the single. Means I can keep one hand free to read, eat, drink a cuppa, entertain DS while I pump. If I'm at the hossy I double pump with their pumps but at home its been great.