There is nothing wrong with this product. I have been in the industry for 45+years. This is a very good copy of the stant pressure tester. Could even be the exact same plans. I have not interchanged parts to find out though. Now, for everyone whining that it does not fit my car. If you want a cheap tester buy one of the ones for 50 bucks and it may work. This model you have to buy all the adapters separately and it will work. Fortunately for me I have all the adapters needed and they fit perfect for this unit. And yes I paid big dollars for them. Welcome to the world of actual wrench pulling.