Its a Itallian brand named MARENO. It is a combo which is normal oven and steam oven(Gas/Electriacal/water).
The temperature/thermostat is very precise and i can set f.ex 82 celsius steam and the temperature wont go off more then 1 Celsius.
I dont think the price range are in what you are looking for as it cost about 6000€
Is it worth buying a steam oven for home use really depends on what you cook. I dont know about the home ovens if they can produce steam in the same way and inject it into the oven which is the part that is very useful when baking bread but you can achieve the same effect by throwing in a glass of water in the bottom of the oven just before you put in your bread. Just placing a bowl of water in the oven dosnt make enough steam to achieve the same.
Other things that its good for is surely steaming fish,the best cheese cake in the world, vegetables, eggs, reheating things, sous vide(you can do that much cheaper by buying a external thermostat and a rice cooker). Well most of the things you can do in a steam oven you can do with other appliances but not in same scale.
Another thing to consider is if you have a steam oven you can be pretty sure that the oven wont last as long before it needs repair as the all appliances using water irrigated or stuck with calcium.
My last repair of the oven cost about 600€