Okay, so I leveled THF from 1 to 15 tonight for farming purposes, and I decided I'd bring in my Aspir Knife I got a loooong time ago to try it out. Well, I wish I didn't, because it's HORRIBLE. Crappy DMG, longer delay than Brass Knife, and the MP Absorption hardly works anyway. I dropped it because it's was completely useless to me.
I don't recommend this knife to anyone really, but you're welcome to give it a shot yourself.