I tried these this weekend. Mixed results using my ANMPS, but don't think its related to the pellets themselves. I tried using the apple with a large pan of baked beans and they wouldn't run, I believe too much moisture. Also tried them with a pork butt sitting in sauce and a large (2-3 litres) tray of water. Again wouldn't burn. The instructions for ANMPS say no water, but I have gotten the Amaze-N pellets to burn with a small water tray. The pellets burned perfectly in the regular tray, just wouldn't stay going in the ANMPS.
For long smokes I am going to have to figure something out because the water tray is key for keeping good temp control on my MES cookmaster. I'm thinking a mailbox mod is in order.