I absolutely agree with all of the topics raised above. For someone who is currently suffering through the PPL syllabus I can see the merits of both arguments. I want to be the best pilot I can be, I want to see the end of my career as a pilot, but at the same time,the books can be rather dry and waffle on. Alot of the text is of nominal use as oppose to being educational fact. For me the question banks help you understand what you have and haven't learnt, and also learn in a helpful way. For instance, I know that I need 10km of vis for an SVFR into a Control Area, rather than perhaps knowing what I don't need. Does that make sense. In this day and age quite a lot of the material seems to be slightly irrelevant. For instance, I will never need to know when a royal flights airspace will become active, because I'm not the royal charter pilot.
In answer to your original question, airquiz seems perfect, and good luck to you!