I really do think it can take your beer to the next step to have temp control. I have a freezer set up in my basement. The temp control probe is taped to the carboy with some bubble wrap over it for insulation, this gives me a pretty close reading of the liquid temp. I then have the freezer turn on when it needs to cool down teh carboy. For heat during the winter I'll throw an electric heating pad in the freezer and turn that on. It heats it up till it gets too hot then the freezer cools it down. I know this wastes a bit of electricity but the heater is on the lowest setting and I don't want to buy a dual stage temp control.
Edit: usually I don't need the heat pad, basement stays 60-65 which is fine for most of my ale yeast.
"People should not be afraid of their governments. Governments should be afraid of their people." - V
Secondary: Shady Lord RIS, Water to Barleywine, Pumpkin wine, burnt mead
Kegged: Crappy infected mild
Bottles: Apfelwein, 999 Barleywine, Oatmeal Stout, Robust Porter, Robust smoked porter, Simcoe Smash