This is way too cheap, I have these, bought it pieces, but I use the tray on an Jr wise, and the 300 vise I mounted on an heavier base, but the tray actually are good enough on its own.
the pcb holder is very good, but buy a couple of other heads for other uses.
I like the 300 series better than the jr, since you get an extra joint that gives more flexibility.
That solderiron holder I dont have, and dont need, but the tray have room for small items, very handy.