we have over 70 customers on Ovrc as of today, and I can tell you that it helped us A LOT. very stable network, i think we only had 2 RMAs ever.
the largest network we have is pre-school with about 15 APs, no issues at all.
I am also not impressed about Wi-Fi range. we tend to use like 2 or 3 Aps in a small combo that we would probably use 1 airport extreme years ago. I am not sure if they are not "as strong" as the others, but we spec more units, reduce the power to minimize interference and everything works well. we did however tried a Linksys Velop system in a job we were concerned about Araknis performance, and we did get better coverage and speeds on the Velop. so you ask, "why you dont use Velop then ? " well, we did install a few of them and we had SEVERAL calls about them going offline after a power outage, losing it's configuration out of the blue, etc. so we stick to araknis for now.