I don't know, it is a tool and all tools are good. Personally, i do not use one. I like the old fashioned way, get my reads myself. I am sure all that data mining comes in handy, but me, i switch my style up t much to really get a good read on, usually if people try and spat off my numbers, i usually get the better of the person. It also is jhust to much for me to have to check numbers all the time just to know if my gut should do what it says i should do. I might try one again someday, but not this day.