I bought the little Gen 2 SmokeFire in December, with notions of it replacing my gasser, MB 560, and Rec Tec.
On the positive side, it produces good smoke up through about 300 or so, unlike a lot of pellet grills. And I think it produces a stronger smoke flavor. I haven't experienced any grease fires but I put an aluminum drip pan under really fatty stuff.
On the other hand, the pellet hopper needs semi-frequent attention because a void tends to form in the pellets above the auger. Removing the finger guard didn't help. It also prefers pulling pellets from the left side, and will completely empty it out, starving itself of fuel while there are a bunch of pellets sitting on the right. I've tried Weber, B&B, Lumberjack, Bear Mountain, and Pit Boss pellets and these issues occur with all of them, both while doing low and slow or hot & fast. It seems to chew through pellets more quickly than the Rec Tec, though I haven't done a thorough test. The little, narrow pellet hopper in the back is a PITA to fill, and the lid gets the full effect of the exhaust (not a big deal, just extra cleaning). There may be fixes for these issues but I haven't taken the time to join Facebook or search the web for answers.
Beyond the pellet handling, I've experienced some pretty big temp swings on the backend of long, slow cooks. The last 2 times it was dropping down to 130 and up to 360, starting about 6 hours in. It eventually settled down to bouncing between 200 and 330. Grill temp was set at 225 first time and 275 the 2nd time. The software updated to the latest version just prior to my last low-slow cook on it (last Wednesday), and this issue still occurred. I plan on calling Weber when I have a chance, and submitted a ticket online over the weekend. I don't care for the app, but I'm not really an app kind of guy.
I like the SmokeFire a lot for grilling and baking, but I don't have any trust in it on low and slow cooks. The old, reliable Rec Tec isn't in danger of losing its spot on the back porch.