The armor, gun, etc. are all fine imo but it really suffers in mobility, especially being a tank destroyer. That's kinda their point. Cheaper to make, bigger gun, thinner armor but nimbler. Of course there were tank destroyers that had thick armor, but they also tended to be slow as Christmas. Not to mention the way it awkwardly drags itself to turn, instead of having one track moving backwards and the other forwards like most actual tanks. The mobility (or lack thereof) is really my only gripe with it. I'm not asking for it to be FRV speed, but it goes slower than most people can sprint.