i think they are very good for their price point, and something to be considered for sure if you have a budget and most of us do. i don't own enough pieces to fully comment on your question, and the pieces i do have, i do not have enough field time with. I used the merino boxers and have no issues with them, i love their extremely light weight tek ball cap and used it last season--bought another one just to hang onto for when that one needs to be retired, and by appearance only as i havent used them, am very impressed with the torrent rain gear.
id like to eventually try some more pieces but cant justify replacing some of the first lite/kuiu/sitka pieces i have right now.....maybe a pair of switchback pants in the future for utah's early august hunts.
i am curious to know how their merino stacks up in comparison to first lite if anyone knows.