I have basically replaced all my First Lite and Kuiu with their stuff and a few casual things too. I've got a rain jacket, puffy jacket, wool, fleece vest and hoodie, brush pants (really just duck canvas), vantage pants, and some hats and shirts.
I guess that makes me a fan boy, but I switched everything over for two reasons. One, I am 6-4, 225 and have a hard time finding things that fit and Duck Camp fits me better than most other brands for even casual stuff. Two, I had a rip in a down coat and then they sent me the wrong color wool. They sent me brand new replacements for both and said to keep what they'd already sent.
I also just think the stuff is good quality and looks good on me. It's not the most lightweight but that's not my biggest concern anymore, and when I next do a long trip I'd probably supplement with some lighter gear. I was just in Houston and went to their store and got the same great treatment I've had with online customer service too.