Breast pump?

With my last pregnancy I got a pump for free from my insurance, I'm not sure the exact brand. Not a major brand for sure. I actually even got two of them. They worked great at first but slowly, started to not have very great suction. I'm trying to decide if i should just buy one next time, or if this just happens to all pumps. I'd love to hear from any of you if you've tried the free ones and then bought one and tell me if you think it's worth buying one? And what are your favorite brands ladies, if I do end up buying one? Has it lasted you more than one baby?