Ovens manufactured by Bosch generally have good ratings compared to other brands.
One customer said in their reviews that it was good in terms of power usage. Trusted Reviews mentioned “Energy efficient” in their review of the Bosch HBN331S0B.
The Bosch HBN331S0B has a child lock, as do most of the other small total oven(s) interior capacity ovens that are a comparable age to this oven.
It was April 2017 when Bosch released the HBN331S0B.