Erik,
I am approaching 100 hours on my Boros (#70) and it has been, to date, flawless. The CL OPV was replaced when issued by CCR but mine did not leak before. I have yet to install the Dome Kit as it too has not been a problem after replacing the original o-ring. (Don't store the unit with the dome o-ring in place.)
We routinely dive in water temps ranging from 34-42 F without issue. Recently I spent 2 weeks filming wrecks at average depths from 250'-310' and the Boros performed great; especially a low WOB at depth with bulky video gear. If you choose to purchase I would recommend adding the gas off-boards; you will use a scarily minimum amount of gas when driving the unit from a bottom stage! For remote dive sites gas filling will also be much easier. The only item that I don't like is the VR's deco algorithm (it's very conservative.) However, you simply tell the wrist unit to "Use Table" and carry on. Kevin & the staff at CCR has been outstanding and quickly responded to my questions and comments.
Alan