Cypro and it's co-product - Pro100, are very potent indeed. Because of the prop content, some will experience some soreness while others who are not sensitive to propinate, will not. Mix a cc, or even a 1/2cc, of any other oil based steroid in the same syringe, and you will eliminate the soreness.
I am very pleased with this product after 4 weeks of stacking the cypro with the straight prop 100mg/ml.