Great. Fast shipping. First attempt on smallest ever Jst SH 1.0mm was successful, works great (green cable - see photo). It is not so hard but needs good eyes and patience. After that crimping JST XH 2.54mm (brown cable - see photo) is like a walk in the park, in comparison to SH this connector seems huge ;) This is the only tool I found for so small connectors. Has two different depths in crimping blade so you crimp all at once! Slightly bend connector arms inside, insert prepared cable, press and done. Check manual for detailed instructions.