This unit I got because well, I could. It seemed like a good idea and it has served me well in many circumstances but I find it is best used for its effects, volume pedal/wah (live) and looper, simulated amps (experimenting at home). It is hugely versatile but I find it is very difficult to play live with only the pedal. I like turning the amp simulation off and plugging into a normal guitar amp because you constantly have to adjust amp settings depending on what PA you're playing through without an amp. I wouldn't sell it, purely because of experimental purposes it has some good synths and bass octave effects to help broaden horizons. It is good for recording too but obviously there are more professional sounding options for a more 'premium' price. The looper is basic and lets you overdub but it is only single track and will only loop for 20 seconds which limits its versatility but it still is good to use to get used to looping.
Quite fun, but certainly has its disadvantages like any other multi-FX boards!