The First Years Deluxe Natural Comfort Double Electric/Battery breast pump is the only pump you will need. With all of the news reports out there regarding harmful chemicals used in the making of plastic bottles and baby formula, breastfeeding was the logical choice for the health of my son and this breast pump helps keep up my milk supply.
It comes with 2 milk storage bags, a reusable cold pack, 2 5 oz wide neck bottles (I don't use these, use the Born Free bottles instead), 2 lanolin nursing pads, standard bottle adaptors breast shields w/nipple adapter, AC adapter, Breastfeeding DVD, Pump and carrying bag.
The installation was really easy. The installation diagrams and instructions in the instruction booklet were easy to follow. As far as cleaning goes, all of the pieces actually fit into the Medela Micro Clean bags that I bought separately, so I am able to sterilize them in the microwave before each use.
The comfort dial on the pump allows you to adjust the suction to your needs. I find that I use the lower setting at the beginning and then transition to the higher suction towards the end of my pump. I find that this pump works so well that I only need to pump for 5-10 minutes. If I know I will be out all day I will feed my son and then pump some to take with me.
If you are looking for a good pump that is easy to use to help maintain your milk supply, the First Years' Deluxe Natural Comfort Double breast pump is the one you should buy!