Sense of "cheapness" in its buttons. I did not feel "sturdiness" in their construction. However, the main disadvantage is that the manufacturer states in the manual that the reheat function is not recommended, nor is there a separate button that activates only this function. The manual recommends using at least 4 cups of water in the reservoir each time the machine is operated by pressing the on/off button. However, since there is no separate button for reheating the coffee, i.e., just to heat the surface on which the glass carafe sits, the only way is to press the on/off button to reheat the cold coffee. So, if the 40 minutes pass during which the device automatically keeps the coffee hot in the glass carafe after brewing, it turns off, and the coffee cools within 5 minutes. In general, reheat does not exist, forget it, unless you want the device to break down prematurely. These things, of course, would not bother me so much if I did not feel deceived, since the coffee maker is advertised as supposedly having a reheat function.
Finally, the built-in filters allow quite a bit of "coffee mud" to pass into the carafe, even when both filters are used simultaneously... as for this, however, I have no comparative experience, it is the first time I do not use disposable paper filters, so maybe I am being unfair to the result. For those for whom it is important to have ready hot coffee at any time for hours, either another coffee maker will be required or a thermos should be used if they choose this one.
Personally, I will return to the previous one, which I maintained and which has a thermos carafe.