I think its is a well engineered oven. Ive used it a few times and have move it around in my backyard, so the portability of it is awesome yet it is very well made and sturdy. I love that it heats up and gets to temperature very quickly. I ve used wood pellets,Hickory wood chunks and charcoal, and they burn beautifully and head nice & even. The stone reaches temperature very quickly and is ready to cook within 20 - 30 minutes. I like that it is a very solid and NOT flimsy. This is a nice addition to my outdoor kitchen - gas grill, Smoker , charcoal/wood grill and now Pizza oven. Looking forward to using this a lot coming this spring and summer.