Large (lace) leaves a 1.5" gap at center front! I do not have a huge neck.
Measure the neckline of your shirt and measure against the pattern before cutting out. The pointed collar versions have a band that extends the sizing so maybe the patterns, as is, are ok with those views.
Were the instructions easy to follow? Yes except I couldn't understitch for the life of me so I skipped that.
Pattern alterations or any design changes you made: I didn't want to handstitch and wanted a machine stitch at the outside edge all around. So, I cut the underside with a center back that overlaps (finished first). It was plenty big to allow me to turn it inside out and I can leave it unsewn.
Would you sew it again? Would you recommend it to others? Yes, but I'll make it way bigger, like an XXL.