The configuration of the GE-7 is about as basic as it gets. It simply has sliders that control the seven frequency bands and also has a slider for the overall output level. I don't have a manual for this, but it is easy enough to use that you shouldn't need it.
The equalization on the GE-7 is clean sounding and the pedal won't add noise or color your sound. It is nice to have the preset frequency bands in the right places, but I usually prefer having control over what frequencies I control, which is why I usually tend to use parametric EQs. If you feel that you need an external EQ other than what you control on your amp, this will definitely do the trick.
I got the Boss GE-7 for about four years ago and since have sold it because I decided I didn't need any sort of EQ pedal. I didn't sell it because it wasn't effective, I just didn't use it enough to warrant having it around. The pedal is clean and easy to use and if you are looking to get an EQ in terms of a guitar foot pedal, this is absolutely worth a try. Boss is known for making some great pedals and this is no exception to the rule.