I use it. I think hand taken notes have more value in a lot of ways, since you have to make the observations in the first place. I also think that a lot of the notes it takes are reads you couldn't really rely on in any way until you had a really big sample. It's kind of a steep learning curve, and to get much out of it you have to put in some time learning how to interpret what it's telling you.

All that said, I think it's worth the money, but it's not a must-have.