I humbly beg to differ.
Similar items are used extensively in hospitals, the technology has been found to yield better results in a great deal of instances than digital thermometers.
I think it's important to understand that you are going to be hard-pressed to get some ulltimate exact reading on ANY aquarium thermometer. They're role should be more along the lines of monitoring CHANGE in temperature. If your heater is set at 78 and your thermometer is reading 76...it doesn't mean that either are wrong, simply that they were calibrated differently. Same goes if you were to buy 2 of the liquid crystal thermometers....if they read 2 different temperatures...it isn't because the technology is faulty, it's because the method of calibration during mass production is less than ideal.