I have been using Pix for a few weeks now and am very happy with the quality. Too bad you can't use it as the default camera app on iOS. Also it takes significantly longer to start up. But if you are taking multiple shots of, say, your kids, the quality is better.
Happy to hear you are enjoying it! We are working on a widget that will allow you to quick launch Pix from the Lock or Today screens, which we hope will help lessen the frustration of not being able to set it as default.
