[This review was collected as part of a promotion.] I am genuinely impressed with the Impresa descaler. It worked far better than I had expected it to. After running a cleaning cycle, the difference was immediate. My coffee ran smoother, brewed faster and the taste was better. This descaler works on many brands of coffee maker, which is nice. I appreciate the versatility. The instructions were simple, the process took about an hour and the results were outstanding! I would 10/10 recommend if you are looking to extend the life of your coffee maker and get better tasting coffee. This descaler is absolutely worth it!