I love Hercules products, they are tough, well built and stable.
But this one gave me a big challenge until I was able to make the "EZ Desk", "EZ Angle Gripping Roller" and "EZ Glide" (3 words for the same thing) to work.
After some trial and error and also a response from an UK distributor of Hercules Brand, the solution is to find the perfect tight setting on the "lower notch" so that the stand holds on the desired position.
Too tight and it's hard to push it up, too loose and it just slides back down.
It's definitely "not easy" but I will give it a try to see if the "notch" holds the setting with regular use.
Also, it would be nice to come with a carrying bag ;-)