I have burned many a cord of r/o. It is my go to night logs on the really cold nights. It is the "best" wood around these parts for heat. Now for the bad, if a tree could be the devil, this would be it, has enough stickers on it to make you leak red stuff everywhere and some type of oil/poisen on the barbs that you will feel it for days, the bark hold enough sand for a sand box, read "dull chain fast" ,and stink..... I mean stink up the whole neighborhood when you burn it, I think that is a plus if you have my neighbors though. I will go out of my way to get it though, it is actually considered a weed in WY now, anybody can go just about anywhere and cut till yer either bleeding to death from the stickers or have enough for the whole town. If you can find some 5 year seasoned stuff, it is hard, man is it hard. I gotta give it praises for beutiful grain though. I have seen some very impressive pieces made out of it.
I have the largest r/o I have ever seen on my property, it is about 40' tall and has about 5 arms that are about 20" dbh from the stump.