Author of The Keyboard Layout Project here. I'm familiar with Workman; it's a reasonably strong attempt, but I think it has a number of problems and fails to perform as well as Colemak or my own layouts.

If you compare Workman and MTGAP 3.14 (shown [here](http://mathematicalmulticore.wordpress.com/the-keyboard-layo...) using [my keyboard evaluator](https://github.com/MTGandP/Typing), MTGAP 3.14 performs better on every single statistic except finger work. (You can see all of the different statistics explained on [my GitHub page](https://github.com/MTGandP/Typing/blob/master/Fitness). I didn't post them all here because it takes up too much space, but if you want, you can pull the program and to the comparison yourself.)