To be honest Ethel (and I say this as an ex appliance engineer) there really isn't much difference between any makes when it comes to ovens and cookers they are really simple devices and there isn't much that can go wrong with them..
90% + of faults on electric ovens and cookers are elements burning out, and as most elements are made by a few manufacturers regardless of the actual brand of cooker they are fitted you see little difference between expensive and cheap cookers when it comes to reliability.
The only place you really see a difference is on the other main fault that cookers have, which are door faults (hinges breaking etc) but those problems are normally caused by rough treatment (or children swinging on the doors!!) so probably not an issue for you.