I have used it in a couple of games. Primarily when I take two slann. One will have cupped hands, while the other is a life slann with the rod. It is really easy to use the rod and regenerate the wounds taken. It works fairly well. However, In games where I only take a single slann, I would prefer to give the slann cupped hands (even with life). I have been known to fail a throne of vines roll once or twice (much more than that...).
Anyway, what I usually do is take a lvl1 skink priest with the rod and the amulet that grants 4+ vs the first wound. I do not care if this priest dies, after all, it is his job. I have been taking this item for the past 8 months and I have only lost the priest a handful of times.