So, about a week or two ago, I thought my hard drive was dying cause my computer has been running slowly for the past couple of weeks/months. My friend told me about this program, called MacKeeper. That it's like an antivirus, and will delete unnecessary folders, and will tell you how your hard drive is behaving, and so on, and so forth. I just want to know if other members here use it also? Is it any good, and worth the money? http://mackeeper.zeobit.com/index Its costs $40 for 1 Mac, $60 for 2, and $80 for 5. Obviously, I'm just going to buy it for just my computer, so yeah. Does anyone have this? Is it worth the money?