I thought I'd post an update in the aftermath of the GRE, if anyone is wondering. For the record, I found Magoosh really helpful, and I highly recommend it. I did end up scoring higher on the actual GRE -- verbal was in the 90s, and Magoosh consistently underestimated my score. To me, that's not a real problem. It scared me quite a bit, but I'd rather they underestimate than overestimate... Just my two cents.