Jody has posted a few more videos of the units on weldingtipsandtricks.com, of both the 250EX and the PowerPro 256. In one he is stick welding with the 256 and in the other he gives a more detailed look at practical use of manual pulse welding.
I hadn't gotten an update recently from his site. So I went to check it out and found these :http://www.youtube.com/user/weldingtipsandtricks
Enjoy!