I generally agree with everyone here. From my understanding, Honda is the largest manufacturer of internal combustion engines. They have a strong reputation for reliability. We own a 2006 Odyssey with the VCM feature (this was the first year this feature was an option). Since 2006 they have improved VCM considerably by making it operate on 6,4, or 3 cylinders as opposed to just the 3 or 6 cylinder operation the older engines (including ours) had. It operates seamlessly, with no other way to tell that its operating other than a little “eco” light on the dashboard. The van has performed flawlessly so far, and it does exactly what you’d expect 100% of the time. I wouldn’t worry about it.