I can't speak to the Hornady, but about a year ago I bought the harbour freight one for like 30 bucks. It looks EXACTLY like the Lyman one that retails for $100 or whatever. Infer what you will from that. I don't use it all that often, but it seems to do a pretty good job with dirty brass and gun frames. Of course, I don't have much to compare it with.
Whatever you get, a couple things to remember (sorry if you know this already): it will strip EVERYTHING from a frame, including the oil that you want to keep, so things will corrode if you don't get something on them quick. It will also strip / weaken some finishes, so be careful what you put in.