This is a knockoff. It appears to be an exact duplicate of the Gripper. I have the Gripper and several accessories. Good product and probably saved me a few times from doing something really stupid. I have no idea what the quality is but, truthfully, it's a pretty simple product in terms of it component parts. Nothing that needs to be manufactured to really tight tolerances. Also, from the pictures, it comes with the drop down pusher. That has to be purchased seperately for the Gripper.
My only concern, is similiar to Tom's. There are no user reviews of the product. I did a quick internet search and didn't find this from any other sellers. If that's true you'd be one of the pioneers for this product. And, you know that they say about pioneers, you can recognize them by the arrows in their back.
Last point. I don't see a lot of accessories or replacement parts for this. If it's no an exact duplicate of the Gripper you many not be able to buy replacement parts, such when one of the legs is sawed through because you didn't adjust it properly. By the way, did I mention that, sometimes, I do stupid things?
If money is an issue I might go with this, however, for the difference in price, for the Gripper, you know what you're buying. To me this is similiar to buying something from Harbor Freight. Sometimes you don't need high quality and, as long as you know what you're paying for, and it will work for you, you can save some money. If it was me, I'd either buy the Gripper or wait several months until this product has a number of customer reviews.
Don't know if this is helpful but this is how I view new products. I'm never the first in line for a new product or an older product's upgrade until it's field tested and reviewed.