The Zoom G1 is a nice digital pedal-set that was the boot to a sequence of digital effects by Zoom. It has no expression pedal but has a Input to it. It has so many tones that I cant refer to them all here. But I can say its Types of distortion are very close to analog ones. In the other side the modulation is a bit bad calculated. It has compressors, Auto-Wah, 4 types of Delay, 4 types of Reverb, 2 types of Echo; Flanger, Chorus, Pitch, Octave, Ring and Phaser modulations; Lead, Metal, Od, Blues, Distortion, Fuzz, Jazz, Clean, Acoustic, Rythim and more Tones. Zoom G1 also has a beautiful large range Equalization. In general, this effects-pedal can supply your need when it comes to the most basic effects. It is not the option for a professional mix, but for a live show it really breaks the stage!
Zoom G1 is a great pedal for beginners, small bands and small gigs, as it provides you a wide gamma of 40 customisable pedals, including many drive, chorus, flangers, wah-wahs and many more types of pedals. The sound is incredibly good for this small non-effect-dedicated pedal and it can give you the possibility of matching many different sounds and styles with it. Possibly it won't be the pedal for huge bands on tour, but it does it's job pretty well!
Was a great pedal for the extremely modest price they were asking for it (now out of production). Very small and lightweight, easy to carry around in a gig bag. Although plastic it has a robust design. Operating it takes a while to get used to, and a good number of the effects have weird and undesirable "artifacts", especially noticeable when wearing earphones, but like I said, "You get what you pay for".