I have the advent Isis manual pump and have a love-hate relationship with that thing! Majority of the time it takes me a couple tries to get the milk flowing and each time i use it, i get frustrated because the suction doesnt stay put! I always have to stop, take a deep breath and tell myself to relax! I pump 1-2x a day mainly to use for when we go out and starting an emergency stash. Any recommendations? Or do manual pumps all kind of work the same?