I purchased this tool thru another retailer.  So far, what I have seen is that you have to very careful lining up the needle tip with the watch band.  A shot of WD40 is also in order.  I will try using it in daylight and sitting it on a workbench.  With a wide watch band (I am stuck with a Relics man watch), you don't have alot of space to engage the pins.  It will be interesting!

Update:  I got the tool to work by using one hand to adjust the angle of the band while turning the screw handle.  Don't rely on the base of this tool to align the  pin correctly.