Wool & Prince has made a great product. I found that the fit is not perfect for me, but nonetheless I wear the tshirts often and really enjoy them. They get a little worn if you wash them.
As for the button down, it is fantastic. I would imagine its one of the best options on the market. It does not wrinkle when packed in your bad or smell after extensive use. I highly recommend it!
PS I love my Tortuga daypack. Couldn’t survive without it!