I use a model 55 which I am very happy with. I considered an upgrade but had concerns about the electronic controller keeping temp to + or - 1 degree. To hold that tight a tolerance it usually requires the element to pulse. The element will not get cherry red if it is pulsing and so will not be hot enough to get the wood smoking except for for bringing it to temp from cold. If the wood stops smoldering then it may not start again unlike with the old controllers which had larger swings in temperature that required the element to be on longer and keep the wood smoking. I think that air circulation to keep the wood smoking would be more critical in the new style smokers as once it stops it would be difficult to start again.