Review on Transfer Sublimation Machine Skinny Tumblers by Kelly Caballes

I am very disappointed with it and am about to return it. If the temperature is set to a certain degree and the start button is pressed, the temperature will abruptly drop more than 60 degrees, causing the timer not to start counting down until the set temperature is reached again. Because of this, the clickable element is broken as the countdown timer is no longer relevant. Another problem is that it doesn't stay stable at the set temperature and keeps oscillating up and down even when no pressure is used - oh I forgot this thing keeps beeping to warn it's reaching the set temperature has, but as it continues to oscillate