I've heard some people say that they like Test 400 and some say that they didnt, so I got some to try. The only thing I am wondering about is that I hear that sometimes the injection site will hurt and even swell up. I also heard that if you run the syringe under hot water before injecting that it would help to disapate once in the body which would help relieve this problem. Is this true or not and has anyone on this site had problems with Test 400 and what do you think of it as an over all product?