I was hesitant to try this product at first, but I'm glad I did! Thanks to my knowledge gained in practice I found this refrigerant to be easy to use and very effective .The pressure gauge was accurate and the instructions were clear. Plus, it`s great to have an automotive tool that actually works as advertised. The only downside was the slightly higher price point compared to other brands. Overall, i highly recommend this product for any mechanic looking for a quality charging refrigerant..