As I understand them to be they are pots with a built in drip tray where water will run to so your plants roots will not be sitting in water and end up with root rot. In that way they are good. My only question is what happens when the built in drip tray system is full? Will the roots then be in water or is there an overflow or an easy way to pour out the accumulated water? You should be able to tell that by looking at them.
As long as your plants are not sitting in water, when the roots are low enough in the pots to then be in water, you are fine. If plants are younger and their roots are not low in the pots if your pots are sitting in some water it is not a problem and what will happen is as moisture in the pots is lost to evaporation and transpiration the water in the drip trays will be wicked up replacing the lost moisture. It will not be enough to cause root rot IF it is not a continual situation. It will only slightly extend the amount of time between watering since you would still then allow your soil to dry out somewhat before watering again. But if left in water, even a small amount, continually, especially if roots fill the pots, you will definitely risk a root rot situation.