The Vault is a Vertical and is very well built. I do not own one. I was going that direction myself until I saw the 6 hour cook time with a full firebox and the top of the firebox so close to the fire. I am not saying they are not still the best option for a vertical, I believe they are I just am going another direction once I found about Peoria Cookers.
If storage space is not the deciding factor for you -> Look as this Presentation.