I dove mine (around 75 to 100 dives) with an Oxy2 + AirZ O2 over this last year. In that time, I had to replace the wrist unit once (lower display flooded!) and had multiple failures on the Oxy 2 sensors. The Oxy2, in addition to being just generally recalcitrant, would also fail to work whenever I had a strobe light on, or someone near me had a strobe light on.
As an engineer myself, I'm more than disappointed with the quality of the Uwatec gear. I consider it "generally unreliable," which, for life support gear, I don't like... I also find it overly conservative, which isn't necessarily bad, but it's not adjustable. If you do a table dive, and you miss what the computer "thinks" you should do for a decompression stop, the Uwatec will lock you out for 24 hours or more. I find that to be intolerable - at the very least, it ought to be able to do "gauge mode," but, alas, it doesn't...
I made the mistake of buying the memo mouse, even - had to find a usb to serial converter to even run it, which is a travesty in this day and age, since USB has been standard since 1997... The memo mouse interface only works about 50% of the time, failing to establish a good connection the rest of the time, and their download software looks like it was written by a bunch of high school hackers, not by professional programmers.
Bottom line, I just switched over to a VR3. I've only had it for a couple of weeks, but I'm really impressed. It's a much more capable computer, will allow gas switching if you have to bail out or want to use a 50/50 or 100% deco bottle, will grow with me into a fully CCR, will do helium mixes, can adjust its conservatism, warns you for deep microbubble stops (something the Uwatec won't do...), etc. The list goes on and on. Unlocked with PIN codes to the level that the Dolphin requires, it's just slightly cheaper than the Uwatec combo... It's also built a lot more solidly than the Uwatec - metal, not plastic, for the bulk of the body, and it's hardwired to the sensor, so strobes and other nearby users won't cause problems with the reception. The VR3 people are actually responsive to inquiries and are willing to listen for feature requests, which is cool, too. It'll also function when you need it most - miss a stop, and it'll continue to try to give you best-guess deco numbers.
Count me in the "no more Uwatec for my diving career" crowd...I regret highly that I bought the Uwatec set when I bought the rebreather. I should've bought the VR3 from the get-go.
