I had an aluminum-neck Kramer back in the 80s. Pluses: Absolutely straight, permanently. No truss rod, no warping or twisting issues, ever. Rigidity has a downside, however - see below. Nice low fast action - yes, they love heavy strings and the action can be set low enough to still play easily with heavies Very bright tone, plenty of highs - you can always roll 'em off if you want, but nothing can bring back what's been bled off mechanically Neutral: This one had a resin fretboard. Smooth and maintenance-free, but it felt plasticy. I missed the friction and texture of wood Negative: Thermal expansion/contraction. At gigs, I could only use the guitar for the first song or two. After that the aluminum swelled and the guitar went hopelessly sharp. When our singer would use it for a couple tunes in the middle of the set, our stage tech had to take it offstage and retune it. Admittedly the venues usually were cool before the show, and the lights were hot. For home use this might not be a problem. Also, modern lights seem cooler than a rack of old school incandescent par64s - those things could give you a sunburn. Another issue that mattered to me personally - the downside of rigidity as mentioned above - was stiffness. I like a lively guitar, one that you can feel singing in your hand, one that comes alive. And much liveliness of feel resides in the neck. Aluminum is rather lifeless in terms of feel. Yes, it vibrates, but it doesn't have the elastic feel of a nice lively piece of wood. Also, it's pretty heavy. One other negative , and this one relates only to that particular design, not to aluminum necks in general: this model, The Duke, was headless with tuners at the bottom of the body. The ball-end string anchor at the neck end was attached with a single big hex screw in the center and if you bumped anything it could pivot. The strings on one side went flat and the strings on the other side went sharp. I believe later versions used twin screws to eliminate this problem, but on mine it was a pain in the ass onstage more than once.