Anyone else using SERP Book? I signed up about a week ago, and I can't rely on the stats. I have 10 keywords in the Top 10, and 6 keywords in Top 20, and their stats are regularly off for about 50% of my keywords, sometimes by 30 - 100 places. I emailed support about this and heard nothing back. Anyone else experienced this and what would you recommend as a more accurate service?