Using the DigiTech GNX3 Guitar Work Station isn't too difficult, but it will definitely take a little bit of use to learn how to use all the ins and outs of the workstation. There are five main stomp box buttons as well as two to scroll between the sounds and a programmable expression pedal. It then has a series of parameter controls for all of the different signal processors and effects. The other main section is for the eight track recorder. The manual should have everything you'd need to know about the GNX3, and is definitely something you should have around if you just got one.
The DigiTech GNX3 Guitar Work Station has an endless amount of different possibilities in terms of sounds, including effects for filtering, chorus, delay, reverb, equalization, and compressor, just to name a few. Pretty much if you can think of it, you can probably conjure something up to sound pretty close. I definitely like the reverb and modulation effects the best here, as I find them to be the most realistic. This is really the perfect box in theory to build a live show around, as you can instant access to each of the sounds that you use using presets and storing. The eight track recorder is also awesome to have because it allows you to come up with stuff on the spot by yourself. I find it to be a great writing tool. The effects in general aren't my favorite, but considering they're all in the same place, they sound good enough for most applications.
While I prefer to use individual processors rather than multi-effects in general, there's definitely something to be said for the DigiTech GNX3 Guitar Work Station. This is really a one stop shop for guitarists, as it has just about everything you'd ever need in a pedal. The price is definitely more than reasonable for something like this, but it's a trade off in that all of the effects are digital and aren't really effects I'd use in the studio. If you're looking for an all purpose guitar box, the GNX3 is definitely something you should check out.