After recently adjusting our thermostat settings, we have it where we're comfortable and the simple, 1 speed furnace isn't cycling all the time. Always between 67&69 degrees, instead of 67 and 68, and currently running about once every 40-50 minutes instead of every 15-25. But having a variable speed to match our duct setup would be even better. The tech did say a furnace like ours is super simple to fix and saves a ton in repair bills. So I guess the 1960's tech they still make has that advantage...I wish I would have got a two stage for better comfort. 95% is good.