I recently purchased BlueChip after a friend recommended I look into it for my Mac. I am so pleased with the results I've seen so far.
Considering the relatively small asking price ($12) I wasn't expecting all the features that BlueChip ended up having. For myself, the stock alerts section is proving most useful, simply because it is often hard for me to keep track of my stocks in a typical busy day. I don't worry so much anymore, because my personal alerts notify me in case anything worth noting happens in my portfolio.
I also had a question about the program, so I contacted the BlueChip staff through email. Their reply to my question was lightning fast and very helpful.
If you actively trade stocks, or are even just beginning your portfolio, I would very much recommend this program to help you keep better track of your investments.