Broadly speaking there are two categories of bookmaker who have a blue reputation on BMR. The majority of them are bookmakers about whom BMR has insufficient information/feedback to be able to say whether they are recommended or not. The second category covers bookmakers whose overall service is not considered strong enough for BMR to be able to place them on the Green List of most highly recommended bookmakers, but who are nevertheless not considered poor enough to warrant a place on either the BMR Orange or Red Lists. In my experience there are a number of good to very good bookmakers with a blue reputation, but also some who, quite frankly, are best avoided. I'm afraid that I know nothing about the operator you mention.