1. it's very portable
2. hopefully with M4L, it can be utilized like a monome in wacky creative ways
3. when I use it live, I won't have the footprint of the APC and have a bunch of knobs that I probably won't use live.
4. it looks like a giant piece of candy!
Hopefully soon I will finish some songs that I want to take out with a small band, and convert my logic projects into live sets, organize them with the APC40, and then perform them with the Launchpad and MPK49 (and a shitload of other gear!)