Yes, it is used on a daily basis.
Just to add to the strangeness, a few days ago I observed that the vehicle slowed down more than normal when I removed my foot off the accelerator. I checked the system and saw that ECO had switched to level 2, even though I had it set to level 1. In the past, when this occurred, I just reset and chose to ignore it. Evidently, the program has been experiencing some amusing side effects.