I guess I'm stumped, why would you not get the tube? I've been using it for about 8 months and have not had one single problem with it lighting or burning completely and I don't go through nearly the ritual Bear described in his post early on. I do not microwave or preheat the pellets and only have the torch on them for 2 - 3 minutes then let it burn for about 1 minute blow it out and stuff it into the smoker and watch the smoke roll out.
The tube is easier to keep lit, but doesn't burn as long. I can get 12 hours out of my AMNPS so it's a good choice for over night's. Not sure of any other reasons.