Easy to install. The lights lighting up on the Memory Stick is a sign to me that the memory sticks are working, and the motherboard is communicating with them. Because sometimes I will come across a computer that has memory sticks that were not installed all the way in. Making the computer act funny. I put the Vengeance memory sticks in before putting in the operation system. A new Custom build computer. After installing the Operation system. I have used the Vengeance memory sticks for some time with no problems. They never went bad, or died out on me. They are very durable. The Vengeance memory sticks are pretty fast too. I do have a Intel I5 3.5 GHZ processor. But together with the Vengeance memory sticks. All my screen pages pop up in a second. Downloads, and updates get done really fast too. I know that a bad memory stick or a slow memory stick would never allow this to happen even though I may have a 3.5 I5 intel processor. So having good memory sticks to go with a good processor goes a long way. When it comes to pricing. I do believe it is a fair price. DDR4s are a new thing now, and sell pretty fast last time I came here to buy memory sticks. So I would not be surprised if all DDR4s memory sticks stay at a high price for some time. I believe I saw 4 in a pack for $600 dollars. But at the price I paid to get the Vengeance memory sticks. They get the job done on the computer that I am looking for. Page screens popping up in a second, and fast downloads that take about a minute. What more can you ask for? The screen page, You can't go any faster then a second, and one minute or less for downloads, and upgrades is reasonable. The only time it took longer then a minute was when I installed the Windows 10 operation system. That took about 5 minutes which includes typing key in, copying files from Microsoft USB stick, and Updates. To Sum it all up. The vengeance memory sticks are a Awesome memory sticks to buy. Affordable, and does the job you expect all memory sticks to do. Along with a good cooling system, and lighting. I would recommend this product to anyone that is looking for a DDR4 memory stick. I also would recommend to have the same pair of Vengeance memory sticks on your motherboard. If you put a New vengeance memory stick paired up with a existing old memory stick. You may not get the same performance. I recommend the Corsair Vengeance memory stick product to anyone that is looking to buy a DDR4 memory stick.