Depends - I'll lay the information out for you and anyone else reading this.Content-wise they practically go through the CGP revision guide - I've seen it multiple times BUT due to their vast experience with past papers they may emphasize the importance of one thing and give extra tidbits of info on another.Up to you - do you want to get help and ask questions from them for exam practice or do you want to just learn the content on your own and hone your exam technique by grinding through past papers.