The Jamstack fills a void for guitarists and other musicians using the latest technology to do things one could not before. It is unique, stylish, and well-built. While it may appear that there are a few slightly similar devices on the market, (Strumbuddy, plug-in portable amps, come to mind), NONE of them has the features of the Jamstack, or can do what it does: Superior volume, sound, and access to an impressive array of effects, amp, and guitar sounds, on the go! I'm still getting to know mine, as of course, there is a learning curve if you want to get the most out of this device. This is to be expected with such a feature laden product.
-M C Big Swig