Just purchased a new iMac which included a Fusion HD. Someone recommended that I add a Solid State HD to my iMac and make it the primary drive. They said that the machine would run faster and more efficient. Well he was correct! I upload a lot of photos that I take with a high MP camera and each picture is a large file. My upload speeds are super fast and no more hang ups. I always saw SSD HDs before when o was looking for them and they cost much more. I didn't know why or knew that they had any benefit. After seeing this transfer files and do some heavy lifting effortlessly, I can see why the cost is more. I can also agree that it is very much worth the cost now if you transfer or upload heavy files. It moves fast without any issues. Losing that frustration is worth every penny.