We tried the free version for a week. During one of our presentations, we were given a call-in number that was already in use. We stayed on the line for a minute to figure out what was going on before realizing this other company was discussing very private financial information. Apparently, they did not even realized we had joined in on their call. Needless to say, we lost that sale. And DimDim lost a customer for life. (We emailed DimDim and never even got an apology or explanation.)