I'm not sure why this has a "BS" title heading. The J45 is a very worthy music-related topic. It's very worthwhile because there are just SO MANY things about guitars that enter a conversation when the J45 is brought up.
1. One of few drednoughts that still has a short scale length---changes the character of the sound AND playability.
2. As guitars go in cycles of popularity--this is another moment in time where the J45 is weighing heavy on the minds or the country's best luthiers. What's Shoenberg's latest project? --J45 knock-off, Huss and Dalton? --J45 knock-off Bourgeois? --J45 knock-off......and all but the Bourgeois are even sunburst. (though all have opted for long scale).
3. What a lovely piece to look at. Especially the older ones with the little rectangle bridge and the tear-drop pickguard. My friend even has a '60s version with the cherry sunburst. Absolute cool. One of the few guitars with a little flash........but not too much. They held back on the pearl (dot markers instead of HUGE traps) they kept all the barf off of the pickguard (sorry J200 owners) and even if that adjustable bridge was a BAD idea......it still LOOKS better that the "moustache" bridge.
4. One of few guitars whose very looks imply a sound, a style, and a level of playing. My fingers get itchy to pick one up every time I see one.