I won't knock it without having ever tried it, but I really don't think this vise would be a satisfactory substitute for a checkering cradle. However, I suppose it could serve as a rotating and swiveling base for the beam of a checkering cradle. From their website, it appears that the jaws are cast steel, and not aluminum as I thought from first looking at the pics. Most of the online reviews are pretty positive, and it seems like it has a lot of versatility. But I was disappointed to see that it is made in China. Not surprised, but disappointed. That makes the $300.00 price a bit hard to swallow. I guess what's very surprising is that we don't see more Chinese made guns than we do.
I don't know of any single vise that would be good for all aspects of gun work. I'm sure I own at least a dozen different vises, and am still looking for a good heavy vintage rear swivel jaw vise at a good price.
There was a nice discussion/debate on the most suitable vise for gun work in the DIY Gunsmithing forum a few years ago.
https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=560228&page=1