I have completed the OG and I intend to return to it to review all questions and answers near the end of my preparation.
But till then I need new sc questions to practice. I tried the Kaplan 800
book but was unimpressed with the sc questions. They seemed to be way too confusing and the differences between the choices were extremely subtle. All in all, they didn't seem representative of the Gmat questions.
So, it would be helpful if someone could suggest a few sources for good sc practice(preferably with good explanations).