This is a good pattern for a vest and I am happy with the outcome. However, if you are a less experienced knitter there are a few details missing from the pattern that you may find frustrating, (little things like when to break yarn, etc.).

Because I was knitting to a different gauge I made the largest size and just made adjustments for length etc.

I did my ribbing on a smaller needle size and picked up the number of stitches I felt was appropriate. I did 2x1 on bottom, 1x1 on sleeves.

If I make again I think I will add a bit of length and also bind off all neckline stitches and then pick up all rib stitches.