In addition to having audio loops, the Iguana has 6 DC outputs so you can power up to 6 attached units. In terms of having a clean easy to use pedalboard, the DC out option is extremely useful.
This pedalboard is a great example of how the Iguana can be put to use. With most vintage pedals the internal buffer isn't something you'd want your signal chain. By making every pedal true bypass you can achieve a clearer signal.
Having various pedals with different shapes and sizes can make it a challenge to stomp pedals one by one in a live situation. With the Iguana all of your switches have the same size and are easily lined up with bright LEDs making it very easy to see whether you pedals are active or not.
The Iguana is a great product for the gigging guitarists who want to simplify his or her pedal board.