I own a Compaq Presario laptop and have been very happy with it. Its original adapter started to fail, and I ordered one of these as a replacement. Many reviewers seem frustrated with the way the adapter connects to the laptop, and now I can see what they mean. The connection is not snug, the plug does not seat well, and the slightest wiggle cuts off the power. I have had the new adapter less than a week, have plugged and unplugged it perhaps six times, never packed the adapter in a bag. It's just poor or cheap engineering, completely unsatisfactory. I'm not going to bother switching it out for another that will have the same problem. I will get along with it until I can buy another laptop. The poor quality of this product and this experience are enough to make me consider spending technology money elsewhere.