I signed up for the free trial with ranking coach and cancelled it with a an hour of registering. That in itself was a very long winded process with page after page trying to get me not to cancel. When I eventually got to the 'final' bit it wouldn't let me take my details off their site. A week later they took a £1 and somehow became a subscription on my paypal account. Not cool as I wasn't told any money would be paid to them after I hit the final cancel button. Bearing in mind I cancelled within an hour and they still set up the subscription, I feel their sign up to a free trial is a complete scam. I can't comment on whether they do anything for rankings as I didn't go that far thankfully. I've cancelled the subscription through my paypal account as that was the only way I could be sure they won't be able to bill me again.