Good thing about a hole in the thermostat, especially for engine costs, you can fill the cylinder of the engine before it has started. In this way, no hot spots due to air bubbles. And no need to top it off during operation.
I used it. Not quite sure if she does something, but I'm sure it did not hurt anything. It will not solve a chronic problem of overheating, but can help if your car is running slightly warmer than you want.
If you want to stay fit and healthy then walking and exercise is must. walking makes your blood circulation regularly and exercise makes your body fit.