The original YLLVape IH/SourceVape Ranger had decent temp control with Dynavaps. I imagine that the problem with temp control is that it would have to tuned to different devices. Temp control in the Ranger really worked differently for each Dynavap I owned, but since I generally only use one as a daily driver, my Ranger was really great at making sure I never accidentally combusted even when I didnt' wait for the cool down click. However the batteries died and they were not replaceable. I even opened the unit up to see if I could replace then, but it would have been too much soldering and desoldering on lithium batteries and well I just wasn't THAT interested