I bought a bunch of Drill Hog bits about 6 months ago.
I only use the bits on my drill press, haven't really done anything serious with them, but they seem pretty good. But then again, any set of bits on a drill press is good for 6 months.
I bought one of their spiral 3/4" unibits, and I use it ALL the time. Its a beast! So far its holding up better than other name brand unibits I've used and abused at work (irwin, milwaukee, klein, etc). It will create spiral ribbons of metal better than any unibit I've ever used.
On the other hand I also bought one of their countersinks, and it didn't impress me. I used it to countersink some fastener holes in some steel square stock. It did work, but not well. Still better than most countersinks you get at home depot that barely even work on metal. I tried a HF countersink for comparison and the HF bit chowdered to hell after 5 seconds of drilling, hah.