Kid Got it for me as a Birthday gift.  Temperature range fluctuates 10 degrees from the set temperature but that hasn't effected the way it preforms.  We have used it several times and has cooked everything to perfection so far.  I'm not a big cook but really enjoy the easy use of the Ranger.  My Kid all have the larger models, so now I am thinking about a larger model.  Great quality!!!  Well designed!!