Mine's Cannon, will be 10 years old next month and I'm still happy with it; I'd had Cannon before.
Temperature very accurate.
I'd never have just a single oven though, especially with two of you.
The small top oven is not a fan oven but heats up quicker, and is cheaper to run.
Most of the time I use that -look for small-sized oven trays that fit beside each other for instance. I can do chicken pieces on/in one dish, a tray of roasting veg both at once.
Actual roasts, and whole chickens go in the main oven.
Silly to pay to use the big oven when it's often one dish, like a baked pasta, one-tray chicken, etc
And when you want to you can have a big roast in the bottom and use the top hotter for Yorkshires