Yes, ToneWoodAmp is considered legitimate. It's a device that uses an acoustic guitar's own body and soundhole to create a range of enhancement effects. It's been reviewed positively by users and experts alike, with many praising it as a fantastic creative tool for use at home or anywhere else. It provides a simple way to add effects like reverb and delay to your acoustic guitar. However, it's important to note that while the ToneWoodAmp can increase acoustic guitar volume, this is not its main purpose. Instead, it's primarily used for its ability to add effects to the instrument. It's also worth noting that it requires no tools to install the device, and it leaves no permanent effect on your instrument. It can be easily detached or re-attached to the guitar after its initial installation.