Product review (4 stars): Surprisingly consistent
I needed two thermometers for a solar water heating system. While knowing the exact temperature wasn't that important, I needed a way to accurately determine the temperature difference between the input and output pipes. These thermometers being so cheap, I decided to order six and select from among them the two giving the most closely matched readings.
When the thermometers arrived, I set all of them with their probes in a bowl of warm water and, to my amazement, four of them showed the exact same temperature, with the other two reading slightly higher (0.2 and 0.3 C, respectively). The two I installed have been working flawlessly since.
Do be aware that the temperature is displayed in degrees Celsius - unless this is a deal killer for you, I recommend the instrument highly.