Not impressed. Sent me a duplicate key then "made good" by sending a lower value/less fun game that I had originally turned down, telling me that the second key was for the original game.
I tried discussing this over Steam chat before giving a negative review but he doesn't even see how this is a problem:
ok, so you got a two games instead one, enjoy them.
i didn't though, i got a worse and lower value game than the one we had agreed to trade for
look at my steam profile
i don't have fidel
it's no probs, not at all, really
probably my fault, i don't know now, does not mater
gave a good game!