It works extremely well. It's not just good for trimming, but for underglazing and glazing as well.
As you mentioned it isn't great for irregular shapes. I have used it for such things, but I had to tap,center first, then use the Grip to secure it in place.
It also has the benefit of having the arms that can be used to hold wares with long and/ or narrow necks.
The Bailey is more flexible, in terms of what shapes you can use with it. But as you said, you have to move the holders. Honestly, if that's the route you want to go, people have posted a step by step here how to make you own, similar device.
I like my Giffin Grip. i have one at home, and in my classroom, where it is invaluable. I want the students to know how to trim but just don't have the time to properly teach them to tap center.
- plumcreative likes this