Having worked with many similar firms in the last 15 years or so, I can say without hesitation that Posirank offers premium grade services and stellar support. I've used them for a number of clients and was pleasantly surprised at how effectively their services promoted my clients rankings within the SERP's. If you are considering them, dive in as they know exactly how to get results. Their offerings are unique and helped me determine exactly what steps to take to obtain premium results for my clients. Highly recommended!