Having used both Mugen and Spoon low temp thermostats, I find low temp stats to be a bit of a nuisance if you don't have an ECU that ignores the water temp parameter.
In warmer climates such as California/Phoenix etc. it might not be much of an issue, but in Canadian climates, in particular Quebec, where you're from, it can cause the car to run in the warm-up maps for an extended period of time. This is bad for fuel consumption as the maps are richer.
I've always found it to be a bit of an odd device - as I do agree with the literature saying that it will prevent the ECU from hunting etc. This happens when the car reaches another threshold near or at a point of overheating. The ecu knows to pull timing and will raise the idle to cycle the coolant faster in last ditch effort to save the motor.
But if you're constantly beating on it on the track, and your coolant capacity remains stock. It's only a matter of time before you reach the cooling capacity of the system and it will overheat. It's a bit of a "bandaid on a broken leg" situation.
Even on my track car, I run a stock thermostat even with a chipped ECU. I just run a larger dual core radiator and have never had problems with overheating and the car warms up a lot faster. Before this, I had the low temp thermostat and with the stock ecu, it would noticeably back-fire for a few laps even when driven easy - because it was still on the warm up map.