What do you like best?
Charlie is simple, yet intuitive. It integrates with your GMail and pulls from LinkedIn, Google+, and other associated social media sites to give you a quick briefing before your meeting. It is a great way to get a quick update on a prospect's role, company, or personality.
What do you dislike?
The accuracy and relevance of the information that you receive from Charlie all depend on how active the person you are having a meeting with is on social media. This has proven to be an ineffective tool when people don't use LinkedIn especially. This makes the briefings on meetings with people not in the United States particularly bland.
Note that Charlie is just a brief overview of who you are meeting with... if this is an important meeting or call, do your research!
Recommendations to others considering the product
If you are looking for something to give you a brief, quick update on who you are meeting with, Charlie is perfect. Its simple, but requires no work on your end so you can be as efficient as possible. Please note that if this is an important meeting, DO NOT rely strictly on Charlie, do your own research.
What business problems are you solving with the product? What benefits have you realized?
The business problem being solved is optimizing the outcomes of meetings. By being prepared and knowing current and personable events, meetings can go more smoothly, be more productive, and eventually, be more profitable.