One of the main advantages is that it can help men to achieve and hold a harder erection. More than 50% of the men who use penis pumps are content with the results that they receive. There are a few faults to these pumps as well. Using a penis pump will not give you perpetual results, therefore you have to continue using it as and when you need to. Some men claim that these pumps become less effective for treating their problems over time. The worst case scenario is when you go too far by pumping too much, which causes permanent damage to your penile tissues and blood vessels.