Summary: I purchased this drive to use as an external boot drive for my iMac. I installed all of my apps and operating system on it intending to increase the speed of my system. It was a success. My system is quite a bit faster than with the internal spinning drive due to the thunderbolt connection and the fast Solid State Drive. Be aware that this drive is two 250 gb drives and not one 500gb.
Summary: Loud beyond comprehension. For some unexplained reason, many manufacturers pay seemingly no attention to how noisy their devices are. I really wanted to like this drive. It just leads me to believe that they don't actually use or really test their own devices in real world situations. For a hard drive that's meant to sit on your desk, this thing is ridiculous.
Summary: I am using this for running Intelligent Artifact's GAIuS version 3.0 (big data, artificial intelligence framework) in a Linux (Ubuntu version 12) virtual machine (VMWare Fusion version 4.1.4) on a Macbook Pro running OS X version 10.8.5. GAIuS is very I/O intensive. Using the Macbook Pro's internal hard drive while running very large training data sets would slow down the computer making it difficult to run other applications.