Chad,
Yes, I have used them both.
The Avery is fine, don't get me wrong. It gets the job done and has built many an airplane! It requires some finesse, patience and a calibrated eyeball... which we all have. Otherwise we wouldn't be involved in this endeavor!
The Cleaveland Vise Grip on is truly a "One Shot Deal"! All it takes is a single pass and you are done! You adjust the clamping force (which IMHO, could be finer) and roll it down the edge of the material. You steer it with the handles and turn the steel rollers with your fingertips. Ziiiiip, and you are done!
I am sure that if both units are in your tool box, you will use them both. Also, both companies are GREAT!
Hope this helps!

CJ