I bought eight crowns. I'm currently using augvape merlins, goblin mini v3 with an extension, Crius (dual coil), geekvape Ammit, and a mad hatter mini dripper. The Merlin seems to deliver the best flavor but some seep a little out the bottom. Next would be the goblin. No leaking problems at all. The Crius is really good but dual coil. All of them have velocity style decks and are easy to build on.