Ya I love them and they look really great but only have them at my cottage so I can set temps a few hours before leaving for the weekend, now when we get there it's all nice and warm. I also used the Thermostat built in app to have 4 different high and low times for each day when we are there acting just like a regular 7 day programmable thermostat.
As for Hydro Quebec events, I have a rule that I can program the day before via a couple of virtual switches (one for morning and the other for afternoon), then when I get to the event time and if the switches are on, Hubitat will disconnect fridge, freezer, water heater and garage heating during the event and then switch everything back on at the end of the event.
Could also set temps on the Sinope thermostats but my main house only has Honeywell 7 day programmable thermostats (from Costco at $150 for 5) but we mostly use a wood stove, so during peak events we use the wood stove more to make sure we don't use baseboard heating. Could not justify buying the Sinope thermostats because of this.
I've managed to get evening events to 2-3.5 kWh (saving me an average of about 13 kWh compared to the reference).
This winter alone, it will pay for one of the 40A switches I got (Sinope also) for the water heater and for the garage heating, which is to big for a digital line thermostat 5200W, I had to use an old mercury type thermostat when I installed it but will most likely install a temp sensor and use hubitat to control it instead in the very near future.