My MIL couldn't get the hang of changing channels on this kind of remote as the arrows didn't mean anything to her.
She really needed buttons that said "BBC1", "BBC2" and so on. The volume buttons were also confusing for her. If it had said Louder and Quieter perhaps that would have helped?
New things to learn and so not suitable.
Sorry to burst your bubble but if your PWD is capable of learning new stuff then it will be fine.