The basic function of driving a pin out of a band by putting the band on the bed, lining up the silver pin, and turning the blue handle works well enough.  You do have to be careful about getting the pin lined up, but that is the nature of chores such as these.  The thread on the handle are more coarse than I would have thought.  I bit finer thread would allow more torque and control.  It works as is and is really inexpensive.  The tool cost less than the gasoline it would take to get the watch to the jeweler.

It seems like the tool may have other funtcions that I couldn't figure out.  There were no directions, so you are pretty much on your own.  The basic function is obvious so that isn't a problem.  But, on the side there is a little metal adjusting screw that move the "bed" sideways.  Maybe it is for lining up the band in relation to the pin, but that seems unlikely.  Also, the end opposite the handle has channels, holes, etc that probably have some function.  They would seem to add production cost, so I don't think they are non-functional.  I used the one channel to put the watch band in so I could line up the parts and get the pin started when I was putting it back together.  It worked well for that.

All this rambling to simply say that some instructions would be nice.  Not really necessary for the basic function, but still it would be nice.