I was so excited to find out that this program was still available. I've been using it, off and on, since we owned a DX2 66 MHz; my son was 10, he's about to turn 40! I've slowed down, sadly. Well, 30 years will do that. But I still enjoy the training and, who knows, maybe I'll pick up my speed again.
It's an excellent program, with enough flexibility for anyone to use. There is a speed test which tells "Mavis" where you need to begin. A warning: once you start a lesson it's difficult to sneak away. Be prepared to work a while. It will be worth it. I especially like the "ghost hands" which allow the user to see the correct fingering without looking down at the keyboard, thus allowing the User to get used to the process without interfering with the flow, as can happen if one takes the time to look down and then has to look up and find the right place.
This program is work. It's also a Lot of Fun. If you're serious about improving your typing, give Mavis a try. I don't think you'll be disappointed.
And, oh, yeah, there's also a 10-key feature.