I've just bought a Gibson Advanced Jumbo, and as is the case w/ all new acquisitions, I really love this guitar. But aside from the novelty & newness, there are reasons why I like it above other acoustics I've owned (Martins, Larivees, Bourgeois, Guilds, etc). Although I play Strats 95% of the time, I've always loved acoustics. When I play them live I use a good mic (not onboard electronics). So I've always looked for a really BIG sounding guitar that held the bottom together w/o getting flabby, had nice sweet articulate mids, and strong rounded high end. From the first chord, the AJ just barked loudly w/o the notes collapsing together. It seemed perfect for stage use, if you want a really nice sounding acoustic that's also loud (although I haven't used it live, yet). The AJ is essentially a J-45 design that was modified in 1936 with some special bracing, etc. Here's an interesting article on the Advanced Jumbo: http://player.gibson.com/oct02/aj.html I presently have it in the hands of my tech, who is replacing the nut and saddle with fossilized Walrus tusq and installing petrified Ox Bone string pins. I chose these material upgrades just to goose the top end a bit, and I'm looking fwd to hearing how it turns out. So, is anyone else familiar with these guitars, and what do you think of them?