I haven't seen or used the Wooster roller but did have a roller setup for my Graco Airless. On a repaint I could paint just as fast with a good lambs wool cover than with the roller. Cleaning could be a time issue.
I could see where it would be effective in industrial tiltup walls though. I guess it depends on the job. I use Wooster's brushes, roller frames, poles and other products and am pleased. Let us know if you use one.
Maybe you can get a rep to let you demo one.