Other than the o-ring issue, mine have been generally reliable. According to my tech, they are definitely more of a PITA to work on though due to engine bay clutter.
My first seven have run a cumulative ~28000 hrs. Coming up on the timing belt interval probably in the next 60 days for a couple of them.
I've since taken delivery of six more of them, and another six on the way later this month.
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