We’ve been using this product for about three or four years and use it about three or four times a year. Have had a tremendous record with it. We have not had a failed coil or a returned visit to the job site result of refrigerant leak. I’ve used it on my own house, got some enclosed line sets and unable to find the leak and that’s been about five years ago. It’s an excellent product, it’s easy to use – the technicians find it very easy to use and easy to sell to the customer giving them options with money and cost of doing replacement stuff which is a big issue with customers.