I have personally never owned any Surly hubs. I do however have friends that own them and the bearings in all of them have been bad news.
I also have multiple friends who work in different bike shops that have nothing good to say about them and have actually NOT let me buy them before. When multiple wrenches, whom I trust, tell me to avoid something - I do.
Now, Im sure some of their hubs are fine and will serve you very well but I would rather go with something else in the same price range based on the amount of negative things Ive heard about them and save myself time and money.