They’re good but you still don’t want the bottom of the pot on a flat surface.
You need (it) to be able to drain excess water out when you water your plant. If it’s on a flat it won’t drain so much as soak in its own runoff. That’s shitty shitty no good
Imo I’d get some slats to run across the plate and put the pot on that so the water can drain out into the plate