the Breville Smart Oven has a substantial 20 x 16 inch (50 x 40 cm) footprint. For me it's a great reliever oven to my 30 inch/75 cm gas range oven. Heats up in a few minutes, and less wasteful than the range oven for smaller jobs. It's large enough to hold standard sized cookware, such as a 13 x 9 pan, 13 inch pizza pan, or 10 inch pie pan. I've baked 10 inch pecan pies in it, and thanks to convection, they cook as evenly as in a large oven.
If/when the oven dies, I'd replace it with the current Smart Oven Pro (had not been released when I bought my base model), which adds an interior light and 12 hour slow cook function (my model's cook time is two hours max).