My perspective on Big O's is slightly tainted due to my background in hard core wheelin'.
I've have a jeeper buddy who was told not to come back to the local Big O due to the huge quantity of tires he destroyed. And, after he cause serious delays on our trial rides, we asked him to not join us unless he changed tire brands...
The sidewalls are very, very thin, and sliced up or got pinched on almost every trail run I did with him. One one particular trail known for it's sharp rocks (Judgement Day for those who know it), he had almost simultaneous flats in the first 200 yards. He had to borrow spares from other Jeeps to get out...
So, no, I certainly won't recommend them.
Mark