You have to define what constitutes a great pizza oven first. For some it is an oven that operates at a very high temperature, and gives up a pizza every 2 to 3-minutes, but it requires a lot of valuable floor space, needs to be manually operated (in/out/rotating), requires free space in front of the oven for the oven operator to work (again a valuable commodity), is relatively expensive when sized for the volume needed, will not be allowed in some locations, may be expensive to operate, lacks portability, gee... the list just goes on and on. Now, lets look at an air impingement oven (conveyor oven). It has a relatively low purchase cost, economical to operate, has high volume capacity, requires a minimum of floor space, minimum to no operator expertise needed, can bake just about any type of pizza along with a plethora of side dishes, can bake both thin and thick crust pizzas side by side, the airflow helps to provide a consistently dry pizza, again the list goes on and on. It just so happens that from a commercial point of view there are a lot of advantages to the air impingement ovens that other oven types just don't have. Deck ovens as well as wood fired ovens are great for small stores (independents) and even small chains, but when you start looking at 25 or more stores, not to even mention thousands of stores for some of the larger chains, you want things to be as simple as possible and as economical as possible from both a purchase price v/s pizzas per hour, as well as space allocation in the store (space is a very costly commodity). So, what is a great pizza oven? It's the one that works best in your specific application. Air impingement ovens can also be set up to replicate most types of pizzas too. The word versatile comes to mind.
Tom Lehmann/The Dough Doctor