So far so good. I have had my water buddy for 6 weeks and it works great. Try to use it in the full bathtub with very warm water. I get my little fellow slightly excited and then place him in the water buddy. Several pumps will get it started. After a few minutes I release and fill up with water again, and this time pump it several times until it is fairly tight. Leave for several minutes and pump again. Once it is good and tight I rest for 10 minutes or so, then give it another small pump. Leave it on for about 20 to 25 minutes and when he comes out he is HUGE. I started at around 6.5 inches when good and hard. Now I am close to 7 inches and much thicker. My goal is 8 inches plus and I will let you know the day it happens. Take it slow - it works.