I used Stanlake's Introductory Economics to crash-course the subject before starting to study it properly later in the year. I found the book to be an entertaining and enlightening guide for my first book in economics (and relatively comprehensive!). Its inclusion of end-of-chapter questions and worked examples were illustrative and useful; I feel that Stanlake has gifted me a valuable first-impression understanding of economics.
The greatest downside of the book is probably its age: it refers to economic case studies and events which were probably more familiar with the millennial than for the millennium baby and it seems to conflict with conventional sources on several points, such as what constitutes the balance of payments. I suppose, however, that this is inevitable for a 16-year-old book - especially for one discussing an ever-changing field of study.
Additionally, on occasions, I felt as though Stanlake did not quite explain more complicated procedures too well - such as open market operations and discount rates in cost-benefit analyses, which were given barely a passing mention. In order to consolidate my understanding of these, I had to turn to other sources - but in this respect, the book was still useful at pointing me in the right directions as to what I should learn as someone who had never approached economics before.
All-in-all, this is a book I'd be quick to recommend to anyone beginning their studies in economics.