My Mac was moving at a snail's pace when I contacted Alan at DNA systems. He came over to my condo for pickup, explained what he planned to do and off he went. Within two days, he told me what was wrong, sent me the cost, I agreed and he fixed and returned my Mac...all within a week! Efficient and painless process; Alan took the time to explain the issues to a non-techie like me, which I very much appreciated. Would recommend in a heartbeat!