I have. Speaking as someone who has a gen, they aren't too bad, but the other parts are not great.
These are the same as the old DW cases, so the chrono pushers are junk and the wrong thread pitch. They should be replaced with ofrei or similar. They had a pretty good 6263 bezel before, but the current 6265 features laser etching instead of engraving and is terrible. Probably replace with a 6263 bezel from NYwatch. Dome crystal isn't great, would go with Clark or Sternkreuz.
Crown is signed with coronet and triplock dots, but the tube is a double seal. Could pass for gen when screwed down.
The back is slightly too thick, but not terrible, and lug holes are too close to the end of the lugs but it does come with some nice thick oe-type springbars and fits gen bracelets and ends.
I offered $150 and accepted their counter of $200.
Hope this helps.