Had fallen apart in transit and had to be reassembled.  Worked as advertised once it was put together and I was able to replace two watch batteries and have a tool for future use.  A few of notes:

*  Tool feels solid and worked well.
*  As others have said, will not fit large watch cases as are popular today.  Measure your watch and check the specs before ordering.  This tool just fit, after some fiddling, a large watch case I have.  A smaller one fit easily.
*  Will not work on all watch cases as some do not have the correct back for this kind of tool.  Check before ordering.