Good and Bad
The speakers do not generate enough volume. This applies to the music being generated by the eBand and the guitar plugged into it. You have to turn you guitar to 10 and the 2 volume controls on the eBand as far as they will go to barely be heard. Even then, played clean, the speakers begin to distort without generating much volume. Headphones don't help. If you are practicing some rhythm with an acoustic guitar, it will drown out the eBand even without being plugged in.
I found that the only solution is to plug the headphone jack to my Orange Crush practice amp. Only then can you hear the music played by the eBand, your guitar in the mix, either through the practice amp's speaker or its headphone jack.
Given the incredible amount of effects, it would seem that the emphasis was for learning lead guitar licks. Played clean, it will provide accompaniment for voice, harmonica, and mandolin. I can also play an acoustic dobro with or without distortion using the eBand. I have not tried it but I would guess that an electric keyboard could be used with the eBand.
The tempo controls are more useful than pitch, at least for me. I have not used this for recording though it claims to be able to work with recording software.
I use my eBand exclusively for practice. If I am gigging, I will take a scratch recording and play along with it. I will also buy a book/CD songbook or lesson book, rip the CD to a USB Stick, and play along.
One other niggle is that the eBand will scroll through an SD card or a USB stick only in the sequence that you loaded a track onto the device. It ignores numerical or alphabetical sequence.
Knowing now what I do about the eBand, I would still buy it. I would give it a pass if you don't have a way to amplify the output.