These are far too expensive. But it is the price you pay for using the latest technology for high-speed transfer. You can use these to connect two Apple computers together, or for connecting your Apple computer to a Thunderbolt-enabled external drive (which is my primary use for them). They are very high quality like most Apple items are, but they come at an eye-watering price. You can attempt to console yourself with the understanding that these cables are not ""just"" cables: if you were to physically destroy the end caps and look inside, you would find the electronic controller components that facilitate the technology. So, you are not just paying for a cable, but also for the controller that is hidden inside the cable's end caps. The cable quality, too, is exceptionally high, and they should last a very, very long time if they are not abused. It's hard to give them a five-star rating because of their cost, but in actuality, they are indeed a five-star product, and if you are using Thunderbolt, I would recommend them over non-Apple brands.HEADS UP!""Thunderbolt"" is a subject that carries much confusion. These are NOT the same as Mini Display Port cables, which are used to connect high-resolution monitors to computers. If you are unsure of the difference, do some research on ""Thunderbolt and Mini Display Port"" to understand the difference. It's confusing because the physical connectors of ""Thunderbolt"" and ""Mini Display Port"" cables are exactly the same, and have the same physical (i.e., size) specifications. But these two technologies perform different tasks and are NOT universally interchangeable. Research before you purchase so that you purchase only what you actually need.