Robyn Veenema is a very knowledgeable and efficient judge. Her courses are very challenging, but not impossible. She can be curt, so best not to have her when the club does not have a lot of volunteers, as she can be off-putting to workers. I enjoyed her courses, so I would compete under her again.
Here are her Masters/Excellent course maps from the Saguaro Scramblers Agility Club show on March 6th, 7th, & 8th, 2015 (click on the image to enlarge):