I'm using Traffic Travis, and though it's very accurate... it takes so long to get results and it get's blocked a lot. I'm rocking 30 private proxies and now I am doing a 120 delay between queries and I'm still getting blocked every 30 keywords or so. It takes me over 24 hours to get all my projects completely checked and it's insanely inconvenient. Scrapebox rank checker is insanely fast, but not accurate... SO many mixed reviews here... hard to choose which one to check out...