I'm pretty happy with how this mock-up looks, but I have a few specific questions if anyone wants to share their opinion (thanks @louisswiss).
I thought I'd like the bright green buttons and toggles, but they may be too miuch. I changed the last button to black for comparison. Any thoughts on what works better?
Is the illustration in the header too busy? I'm not an illustrator, but I think its working.
@jamesfmac Also changed the subheader to convey some of the app's utility. Too wordy?