I burned 100% bio-bricks last year. Roughly 3 and a half ton got me through the season here in southern NH. I'd for the most part agree with the claim that a ton is roughly equivalent to a cord of seasoned firewood. Fire goes for the most part 24x7 as someone is always at home. My stove is an older Kent - closest thing to compare to would probably be like a Pacific Energy Summit. I found the best way to burn them in my stove was to start with a "starter load" (about 4 bricks), let those catch nicely, push them to the back, and load in front of that anywhere from six to eight blocks at a time, packed together tightly. I would always have coals and a warm stove in the morning, but not enough to start another fire, always had to reach for a quarter super cedar in the AM. Of course every stove is different. One thing I can say is that they burn really, really clean. Had the sweep just come out last week and the only thing in the liner was pretty much dust. I didn't see how much dust there was, but I got the idea from the report that my wife gave me is that he felt the bricks were "doing their job well".
Seems the "tighter" the bricks are compressed, the better they do. I had gotten a load of "eco-brix" or something like that a few years back, and like others have pointed out in this thread, these "loose bricks", they just kind of balloon up and fell into a pile of useless black sawdust in the stove. Not a good thing.