The general configuration of the amp is quite easy to follow and easy to use. Getting a good sound is as easy as plugging your bass in and manipulating the controls to your taste. While it is a small amp, it does deliver a big sound that is perfect for practicing with. I don't have the manual for this so I don't know how well it is put together.
I use the Hartke KickBack 12 for rock and pop music, but it is suitable for all types of music that you are using electric bass guitar in. This amp is made specifically for bass guitar, so I wouldn't use a six string guitar with it, but could also be usable with keyboards. The overall tone is full and you have a nice amount of controls with the EQ and shaping parameters. The sound on this is usable and fine for most situations, but it isn't close to the best sounding bass amplifier in the world.
I've been using the Hartke KickBack 12 bass amp for about six months. We needed a cheap bass amplifier for practicing with my band and this has definitley done the trick. It is perfect for these types of situations and would even sound good for a live show. I probably wouldn't record with this, as I usually record bass guitar direct. This being said, have the XLR direct out is helpful and is good if you want to record straight from the amp. The price is reasonable and even though it is a small amp, it delivers a ton of power and sound. Overall, I recommend this amp for bass players looking for a cheap practice amp or something that they can easily move around.