A wonderful collection of effects built in with the ability to add more effects with Zoom's iOS webstore. Sadly Zoom has stopped releasing new effects but there are a ton to buy. The AMP sims are a bit meh but where the pedal really shines is it's massive collection of delays.
After this was discontinued, Zoom released all the paid stomp algorithms for free. Have now got almost 200 different fx on this. Took a while to get muscle memory on this, but it punches way above its size (and price). Very useful box. Only complaint is that each effect should have had a "% of processor" as some fx take up a lot of the cpu cycles.
Wherever I take my guitar, I've this great multistomp with me. Due to its small dimensions, a single stomp size, you can put it inside your gig bag, as a Swiss knife that you have always with you at rehearsals, or at any improvised jam. And, moreover, as backup pedalboard in your gigs. And it's great it works with just 2 AA batteries, so you don't need to carry any power adapter.