I'm about 15 bags into my ton of Purcell DF's. I bought these because the shop was out of the LaCrete's I've been burning. It's a bit of a drive to the shop so I didn't want to come back empty handed. They were way more expensive (around $345, IIRC) whiich is$65 more per ton than I normally would spend. I justified it because they were DF and I fiigured they'd be hot and clean. The ash looks pretty decent but I have to crank the stove to get any heat. The ash has been clinkering in the pot and the flame is not very high for the stove setting it's running at. I'm gonna give the stove a cleaning today and see if it improves. So far, not impressed and not worth the money. They don't appear to be any hotter than the FSU's, just cleaner. For the extra $100 a ton over the FSU's, I'd buy the FSU's and just clean it more often. The pellet length is pretty long so it's possible the feed rate is lower because of that. I'll update this if anything changes.