I find it to be a useful product for warming the guitar sound.
It is a useful and relatively inexpensive product that I will use when practicing and or recording. whether using it I'm using it as a preamp to a pod 6 modeling unit or as a direct preamp to the mixing board it greatly enhances the genuine sound of natural tubes for both guitar and bass. For the price you can't beat it. It is a great tool for using in a area where space is limited and using amplifiers just isn't practical