Add-on Wireless Temperature Sensor

I recently bought two of these Add-On Temperature Sensors to provide better control of the temperature in two rooms in the house. I had already installed a similar sensor in the lounge as part of the original purchase just over a year ago.
The sensors look smart on the wall, are fairly easy to configure, and work well. The only real irritation for me is that the clipping on of the unit on the back plate is not at all positive on any of the units meaning they can be easily dismounted and fall to the floor if knocked. I would have liked to see a retaining screw. to prevent this.

I have installed one of these in our living room which is set up to regulate the room temperature by controlling two radiator thermostats. I've had no issues with it and it works well.

As others have said it appears very much overpriced. I want a further two to provide better temperature regulation in other rooms, although I'll wait to use a discount code as it isn't worth paying full price for one. They've been 'sold out' for the past couple of weeks anyway, and Tado can't give an indication of when they might have more stock which isn't very good.

Why is a bit of kit that provides so little function so expensive? Fortunately had a 40% discount code. At £45 still expensive.

I have no issues with the functionality or features but for what it is, a wireless temperature sensor, it is very overpriced

Got one of these as we have built an extension, which has multiple radiators. The temperature sensor allows you to place it where you want so that the temperature is right in the part of the room you use the most