I find the golden chest to be kinda rubbish. I mean I can go and farm captain blades treasure room for days and get weapons and stuff that blows the golden chest out of the water. Hell I got most of my legendary weapons just from farming the treasure room.
I got a pretty sweet grenade mod that I used for a while, but I replaced it when I found a better one in the second DLC. Other than that, everything I got was worse than what I was already using or a gun type that I don't use at all.