[bluGill]

When reading/listening and doing you encounter thousands of facts/words/whatever in the same amount of time spaced repetition will give you tens. If you are a complete beginner spaced repetition does well, but that is misleading - it does well in the easy to study situation of someone who knows nothing and doesn't examine the much harder to study place where someone knows a little something where you spend most of your time.

If you know nothing, spaced repetition can get you over that initial hump well. However I maintain that you quickly reach a point where you are beyond that and then space repetition is less useful than other courses of study in general. Use well it can still be a supplement to other study methods, but those others should be the priority.