Great pots, very stylish - I had read the reviews so knew it might crack when making drainage holes so avoided the middle and did it in the four indentations on the big pots. Would recommend you only make two drainage holes as probably won’t crack much that way - I did four and the fourth caused a crack rather than a hole. Even so they were fine with some crocks at the bottom and then filled. 
Not used the inner pots yet as I wanted tall black ones and these seemed good value versus comparisons which were either too expensive or cheap for indoor use only.
Happy with these - just choose your drainage holes wisely!