That looks like a good tool, but the impact of nailing might break loose the corners, unless they are secured & well-supported.
If I were to try this tool, I would glue & strap all the corners and let them dry. Then, I'd turn the still-strapped frame upside down, make sure the inside & outside edges of the profile are supported, and drive the v-nails.
A tool like this might enable one to duplicate the results of using a pneumatic v-nailer, but there wouldn't be much, if any cost savings.