I seem to constantly see people on this and other forums complaining about Unbound and how it has wrecked 7th.
In my area and the stores I frequent, both competitive and fun play I don't see any unbound lists winning.
Our GW store had a 9 week league that allowed unbound lists and being that prizes were on the line I expected to see some true nastiness. But no.
My personal experience is that our players consider the advantage of the Command Benefits of their Detachments to outweigh the need to bring 'all the crazy stuff'.
Sometimes I will see the Lord of War (super heavy) belonging to the allied detachment's faction and thus unbound. But not a huge deal at all.
I should also mention that while leagues I have played in allow unbound, all of the tournaments require Battle-Forged only.
Anyway, what is your actual experience at your LGS or group?