This unit has one set of inputs and outputs. It has a switched volume control and a wall wart power supply. It is extremely easy to assemble. There is no wiring or soldering to be done. Just assemble the case and you're ready to go.
My initial impression is that it sounds pretty sweet. As you might expect it's going to be enjoyable on voices and small ensemble music. The places where it fails are that it doesn't have a lot of gain or low end. It also comes up short on dynamics and detail. But that's in comparison to my VTA SP13 tube preamp, which *should* blow it out of the water.
So how good is the Little Bear? I like it. If you're interested in enjoying that euphonic tube sound for real cheap, this is an OK way to go. A lot has to do with what kind of music you listen to. You're not going to get anything like what's needed for big rock 'n roll, big band jazz, or even large orchestral works. Run the Little Bear for that kind of material and it will be found wanting.