Propane vs. natural gas fire pit, which should I buy?

Reviewers frame this as a convenience-versus-permanence decision. Portable propane bowls and tank-fed tables work anywhere and need no installation, but you refill 20 lb tanks (community sources cite roughly 6–8 hours of burn per tank at 50,000 BTU). Natural-gas models like the concrete Elementi tables require a plumbed gas line and a professional install, but never run out mid-evening. Several models (e.g. Real Flame Aegean) ship with a natural-gas conversion kit so you can switch later.