I have the Aeris version of this computer - which I love. HOWEVER, i totally agree that the screen is difficult to read in clear/bright water. It is frustrating to say the least. I mean, when you drop that kind of money you would expect it to work in the beautiful waters you want to dive in, right? My LDS said the new version is supposed to have addressed that. I love the AI, and have two transmitters for two separate tanks.
In terms of the VTX and its old problems, the only problem I've been aware of is water intrusion in one particular run:
The only computers affected by this alert are VTX WRIST UNITS with serial numbers between 565 and 3632. All other serial numbers are unaffected.
See their quality alert:
News - VTX Quality Alert
What about battery life and other reliability issues we have been hearing about when it first came out? Any issues with it?