I've owned many dive computers over the years, but after really putting my new Perdix through its paces, I can't see myself diving anything other than Shearwater in the future. The design and function is purposeful and thought out, rather than haphazard and thrown together. I was a little mad that the AI came out one month after my purchase, but I've made peace with that. So, here's my Shearwater "advertising ready" photo . Taken early one morning at the Makena Landing shore dive site on Maui.