I really like the pattern. Makes a beautiful and comfortable backpack.
The instructions are very difficult to use and understand. All written in shorthand abbreviations. It required lots of back and forth from a cheatsheet. Still some parts were never clear to me. As an experienced sewer I was able to figure it out after some trial and error and plenty of stitch ripping.
If the instructions were improved this could be 5 star. As they are now, i found it almost unusable so I have to give it a 2star. I could never suggest this to a beginner. I guess most people also pay for an additional video to do the same as the instruction, but was warned that was confusing as well so chose not to.