The Amahi UK660C Classic Series Koa Concert Ukulele is great for its traditional choice of wood, and overall quality and value.Built from Hawaiian Acacia Koa, the most traditional of ukulele woods, the elegant curling of the Koa makes this ornate wood sought after by builders and players alike. It has the crispness and clarity of the finest rosewood, but with all the warmth, thick tone, and airiness that mahogany possesses. Its individual note definition has magnificent separation, with power and projection that is almost self-generating. The UK550C is overall a magnificent uke.