It's fun to read reviews like this:
http://typing-software-review.toptenreviews.com/
Do you know why? Because loads of users who download YESolo on the Keyboard have already tried these top ten and... are still searching for THE typing tutor.
I am actually impressed with the number of features listed. All of them are really useful and cute. Obviously, the success of touch typing training is hidden somewhere else.
However, the choice is left for the users.