I looked at several brands of breast pumps when I decided I was going to nurse. I really wanted to buy a Symphony breast pump because it had so many good reviews, but it was way too expensive for me.
This is supposed to be one of the best pumps and it is very light and efficient, but most people can't afford one especially after your baby is just born. I know some people that have rented one for a few months and this seemed to work out quite well for them. You get the advantages of this pump without all the cost.
I ended up going with a Playtex breast pump which did not have all the features I was hoping to get, but worked well enough for my purpose.