Hi Esther - thanks for the wonderful book [b][i]:-)[/i][/b] I thought the book in general is very accessible, easy to use and enjoyable to look at. A few minor critical comments/opinions: 1) interspersed throughout the text are positive comments from people. I personally found them distracting - it's the sort of thing you expect before the text. I think they could be okay (good even ) in the text if they were toned down a lot - they currently have the same 'look' as the instructions which confuses initially - I think they would be better & less intrusive with e.g. a very light grey background. 2) I found the 'Anatomy' appendix incomplete. From memory, for an absolute age I couldnt find out where the Psoas are - I know it's in the book [i]somewhere[/i] (I know I even read it but promptly forgot it too!) - I ended up finding it on the internet. I think they're may have been other muscles not shown there but I cant remember offhand Thanks again, Tom PS - 3) is there any info anywhere about how to become a certified instructor? (I presume one has to be certified to teach it?) Edit/ 4) I forgot: normally when you register in a forum, your email adress is hidden by default - here it's the opposite - I know there's the option to change that but I suspect some people dont notice. Maybe I'm just paranoid on the internet but I'd recommend changing that if possible. Apologies for all the criticisms - all meant in positive vein!