I use many of their vessels. The quality is a few steps above the typical containers. Yes there is an ongoing stock issue but I’ve learned to adapt meaning I offer a wide variety of containers from more than one place. California candle supply, flaming candle, Aztec candle have also been struggling in keeping containers in stock. But it’s not an issue on their end. I’d say keep an open mind, have a few containers from different vendors so you don’t rely on just one jar. As far as wicking, they are like all containers, you have to test.🌸