I use whatever I have laying around.
It isn't too terribly difficult to unlock XPs. A lot of people get a bit paranoid because of how small the L1 area is. Just tape off each bridge, and work slowly and diligently. Mistakes can be wiped away, so don't get too excited.
That little kit looks nice, but if you've already got some super glue and conductive paint or lacquer laying around (as well as a bobby pin or sewing needle, and some scotch tape) there's little point in dropping $16 for it.