I am currently converting all my indoor plants to self watering pots and completely in Pon substrate using Lechuza pots and Pon. I love their pots and the colours they offer, very modern looking pots and I like the Lechuza tag at the front of their pots. My favourite are the round ones and wished they did a larger size for my larger plants. I am not in the position to comment if their self watering system works or not because I have only just bought them but I looked at a lot of reviews on YouTube etc and they all say the Lechuza is a great self watering system. I am keeping my fingers crossed for now.