My daughter was born at 25 weeks gestation and I was given this pump when she was born. I have a love/hate relationship with this thing. I exclusively pumped for a year and this pump and while pumping with something I dreaded every day through that year, this pump was my saving grace. I struggled with producing enough milk and the high strength of suction this pump provides allowed me to exclusively feed my daughter for a year. It does have a defined sound, but I wouldn't say the sound is overly obnoxious. This pump is a hospital grade pump, so it is more expensive, however, it is worth the investment.