I think that Matt is quite happy with the vest:
Personally, I think that the armholes are a little long, but the wearer disagrees with me, so they'll stay. I love the simplicity and color of this garment.
Pattern: the vest in Ann Budd's The Knitter's Handy Book of Patterns.
Yarn: Heirloom Easy Care 8-Ply (10+ skeins), shade: 727
Needles: US 6
Gauge: 5.5 sts/in and 7 rows/in
What I changed: not much. The pattern's structure builds in opportunities to make modifications. I used an i-cord edging for the V-neck, and a modified i-cord edging for the armholes. I reinforced the back neck by picking up and immediately binding off stitches.