It is great for the price ($4-6!) but it is a bit light and doesn’t always respond well, but of course that can be fixed. It uses foam pad response and a bearing a little smaller than a duncan bearing. They are available at some Walgreens but I would check online to make sure they’re in nearby stores. I’ve heard from some people that they’re better than Raiders :o. I don’t have a Raider but they costs as much as 5 dominators so, ya know.
You can silicone recess them to solve response problems. You don’t have to put in a groove like some yoyos.
To add weight you can put silicone under the caps. To take off caps shove a thin flathead screwdriver in between the cap and body wiggle it a little Then add silicone in the inner ring and put the cap back on after it’s dried.
But overall its an awesome looping yoyo and I would recomend it to anyone interested in learning 2a.
YOYOEXPERT EDIT:
Please do not post direct links to stores. Instead just mention that you have seen them and people can PM you for more information.
Thanks!