That look's like a awesome mix, Ive not seen the Vegetable and herb one.... what does it say it has in it? The other types pro-mix bx, and pro-mix hp are all good from what ive seen, and this one looks good to.
It contains mycorrhizae which is very good for the plants roots, I use it by itself in my potting mix's I add 1 Tablespoon to 3 gallons of medium, and it seem to work wonders! So id Say this stuff is good, maybe add some perlite and worm castings to it??