The handling is simple and the pump serves its purpose. However, you should have good forearm muscles. The pump can then but already require some force permanently. Cleaning is also no problem. The pump can be quickly and easily separated and again to be built together. The screw closure fits on the metalated Aventflaschen. Annoying only the squeaky Geräuschkullisse was at each pumping movement (hence only four stars). Ansosnten but I find that this is a great value for money. Can recommend the breast pump.