Nothing in the chests are better than what you can already get in the game. If you're not farming or playing co-op, then use up the gold keys.
Agreed. I used one of my Golden Keys, had quite a few so decided to use one, got a pretty sweet pistol. Then whilst playing the new Mr. Torgue DLC I got the exact same pistol in a normal chest, right down to the same attributes. Still, I have got some awesome Shotguns from there.
I had like 15 keys as of last week so I cashed a few in with my level 35 character and I got a pretty sweet Shotty and one of those Grenade Launcher Assault Rifles that does massive damage but the best thing I ever got with a key was a pair of lv 25 class mods that I was using one on my Commando until lv 34 or so.
Whilst playing online with some friends I cashed in some of my Golden Keys. Got a fucking sweet Corrosive Sniper Rifle which just destroys things, especially Robots. Still looking for a decent Shield, though.
Oh, and McQueen, Tiny Tina is back in the Torgue DLC, so there's another reason for you to like it.