Purchased the Ironwood 885 for smoking a 20 lb Thanksgiving turkey and a boatload of stuffing.  Everything came out great.  The temperature control on this smoker amazing and the app makes controlling the smoker easy without having to go outside.  I also have an older Pro Series 575 (before it was called the 575) and there is no comparison between the smokers (not that there is anything wrong with the Pro Series, I love that smoker too and plan on using both for cook-outs this summer).  So glad I upgraded.