Replaced my Viking double wall oven with this unit and what an improvement!  The Viking unit was 20 years old and served us well but when it came time for service the price to fix it was outrageous almost double to cost to replace it with this oven, so we decided to replace the old unit with this unit. We never used the convection feature on the Viking so opted to buy this unit which lacked the convection but it is a smart oven which is a great feature and we use it all the time. The app is great, with features to turn it on remotely to preheat the oven and notify you when its reheated, when cook time is up, etc. We love the no fuss racks which in my opinion our better than the stainless as they are easier to clean.  
I have to say that this oven does a better job of cooking than our Viking unit did for a fraction of the cost, which at the end of  day is what you want your oven todo.