My Mac was running slow and was rather sluggish; also it took exactly 30 seconds to shut down when I attempted to put it to sleep. I called iyogi for help. I thought the price of their service was steep, but agreed to buy a two year tech support plan. They also took control of my computer so as to be able to fix whatever the problem was. After working on it a while they told me they thought it was fixed and turned control back to me. The problems seem to be fixed. It is much faster and the sleep problem is no longer an issue. So far I am very pleased with their service.