I was under the impression that this used a similar principle to the one that keeps hard drive heads in place. So some reasonable amount of vibration should not be an issue. On the other hand, assuming a reliability similiar to hard drives, failures will happen. and in worst case, will send a weighty heatsink spinning at 2krpm flying inside your computer case. Given how collision-unfriendly that baby looks, its not something i would want to happen inside my desktop box.