I can confirm. I used Dave when he opened up his shop and had so many fittings and spent so much time with him schmoozing. The amount of time he spent was way out of proportion to the money I spent. A real class act and very friendly.
Although I won't be ordering from Linjer, because they don't carry vertical messenger bags, I would not hesitate to go with navy. I picked up a dark navy messenger bag from Serapian and couldn't be more pleased. Go with navy.