So last skirmish vs Expert CPU I did an experiment with Tank Hunters on a 4vs4 map (I don't know the name but it has an airfield/airport with a bunch of snowy terrain and plane) and like always they always make T3 Puma/Geschultzwagen/StugIV/Nebelwerfer and T2 Pak 38 spam. I made the men against tank upgrade and made about 6 Tank Hunters, but only since its a skirmish. They seemed to do very well agains half tracks, Pumas, and can even take on a StugIV head on! Also they can kill Nebelwerfers and Pak 38s and the vehicle itself pretty good. I even destroyed a King Tiger with the 6 Tank Hunters, mainly by throwing grenades and having another squad to bait so the Tank Hunters can flank. I'm still not sure how they perform in a REAL game. Probably I would take the AT gun anyday.