Bought this product as a nice easy portable external speaker. For the price I wasn't expecting much. When I used it for the first time I was absolutely gobsmacked by the sound quality. I had been with my brother in law a couple of days earlier when he had purchased a similar product for twice the price from a high street retailer. This is every bit as good.
I purchased this book after signing up to do the A1 assessors course. I was given a copy of the awarding body standards for the award. After reading it a couple of times, I decided I needed a plain English interpretation instead of the academic gobbledegook in the standards. I have found the book to be very useful in translating what is required. I would recommend it to others.