have owned two visions between wife and I...long story, the ending is self evident.
Have owned two GF's, very happy with, but got the "must have the newest" bug, so sold them and the pursuits are on the way
Own two shearwater HUD's... as far as i'm concerned this computer has revolutionized the way I dive and it deserves being singled out as the HUD that has the potential to be used as a primary, IMHO. It is driven by it's own computer and battery and tracks all three cells. Honestly, I can't say enough about how being able to see all three cells in real time po2, all the time, has helped me establish a po2 centered monitoring regime, particularly convenient for maintaining po2 through manual injection. It has shared three cells with the GF, but I have considered putting the GF, soon to be Pursuit, on a 4th cell, devoting the main three to the HUD for true isolation. I'm becoming a big fan of the po2 only primary concept mostly because it's what can change the fastest and be the deadliest, the one thing that needs very regular, active monitoring. I probably still check the handset as much as I used to on the vision, but now my po2 monitoring interval is practically continuous. It helps a lot that the rate of pulses increases as po2 goes up or down from 1.0.
After two years of diving CCR's, i'm only now beginning to feel that I have a system worthy of my mistrust.
