I have used the manuals...and they are not worth the money. I bought a Medela pump in style. It comes with a little cooler that fits 4 bottles with the ice pack. All fitting inside the bag. It is great. My little guy is now 13 months old. He would not nurse, so I pumped and gave him the bottle of expressed milk. Once you use an automatic, you will never go to the manual. It is worth the price. You can get the pump and all the parts at any Babies r us or Target sells some parts. I have heard the Medela (that comes in a back pack not the briefcase pump in style) is even better, but my insurance paid for this one, so I didn't complain too bad!
I also took about a yard of cotton fabric and folded it like a bandanna and used it to hold the bottles in place so I could pump hands free, I would cover my self up and drive to where ever and pump(you can buy an attachment to plug into your cigerate lighter in your car). This saved me a lot of time. But I used my pumping time to answer/write emails or just hold my baby and feed him his bottle from the previous pumping.
Good luck