My opinion is these pellets are not worth much but do have potential.
Based on all the printed info I read I took a chance and picked up a ton. As soon as I opened the first bag I was quickly disappointed. At first glance they appear ok. longer in length, light in color and they actually smelled like fresh cut wood. Then as I began dumping the bag into the hopper I noticed the bag was loaded with fines, saw dust and tiny pieces. I took a few longer pieces from the hopper and tried breaking them. They didn't really have a nice crisp "snap". They just kind of broke into two large pieces and several crumbled chunks.
They do burn ok with decent heat but they contain so much saw dust they do not settle in the hopper. As they are consumed and the auger well at the bottom of the hopper runs dry and the stove shuts down. After just five bags there was so much sawdust I had to vacuum out the hopper. I have a Quadrafire insert and have never had a problem burning any pellets. (some just burn better than others.) When I sift the fines and saw dust out of the each bag I can burn them ok. It's just extra aggravation I would prefer to avoid.
So bottom line is.... Blackstone pellets have some potential if only they could reduce the amount of sawdust.
Here is a pic of the incredible amount of crap I get out of just one bag.