The oven heats to 350 in 4 or 5 minutes. The timer is easy to use but not really audible if you are out of the kitchen. The published specs suggest the oven is 18.5 x 18.5 inches but you can't fit a cookie sheet that big into it. Probably 17" (outside dimension) is the largest that will fit because of the bulges on the side to hold the shelves and the slope up in the rear of the shelf to keep things from sliding off the back.
Bottom Line Yes, I would recommend this to a friend