Some people have claimed its pretty good. The company claims you can learn to type 80 WPM with one hand. They are super expensive because they were designed specifically for people that have only 1 hand, but there are some people interested in just using a single hand to type so they can work more efficiently with a mouse.
However, that might not be a great idea. Some two-handed keyboard reviewers have tried it out and at least one of them thinks its an absolutely horrifying device that he can't imagine anyone learning to type well on. He seemed to think it developed a reputation as being a good one handed computer simply because there aren't any other options.
However, that might not be a great idea. Some two-handed keyboard reviewers have tried it out and at least one of them thinks its an absolutely horrifying device that he can't imagine anyone learning to type well on. He seemed to think it developed a reputation as being a good one handed computer simply because there aren't any other options.