I've heard of a few people completing all of the EK 1001 series, but not many. Most people usually do every other or every third problem. Then if they're especially weak in an area, they do the entire set of problems for that section. I think the EK 1001 series is great for nailing down the basics. It will probably help someone get into the 9-10 range pretty easily if they review their TIMED practice afterwards. Once you get above the 10 range, most of the EK 1001 is not as useful, but still good. Even with a score above 10, you'd be surprised at how much EK 1001 can help. I think it helped push my score a couple points higher. Give them a shot.