Probably the best of the 'gladiator' sword-n-sandal films of the 1960s, or at least that I have seen. The plot has plenty of twists, but never gets so convoluted that it can't be followed with interest. The fight scenes are pretty well done, especially the final revolt at the end. The acting is above par, even from sword-n-sandal regular players - Harrison is surprisingly effective.
There was a pretty amusing moment towards the end, when one of our heroes is attacked by an angry gang of midgets. Well, I guess you can't get through one of these films without some toss off goof.
On the whole, one of the more entertaining 'muscle' films of its era.