A friend of mine bought 1000 of them and in a drunken stupor I thought I liked them alot...then we played them the following weekend and I now believe they are worth what you pay for. Not bad or good..just priced accordingly.
Now the smell....my wife is convinced that I'm part dog due to my incessant need to smell things so of course I know exactly what you're talking about. I was playing with 27 people and I seemed to be the only one who wanted to talk about the smell of those chips.
From what I know, these are China made, which makes me worry about that particular chemical smell given the context of China's industrial processes. Don't take this the wrong way, as I've had relatives fall to cancer but I kept saying they smelled like cancer meaning harmful. I also noticed I had difficulty breathing after the game (just kidding...that was due to me being out of shape).
Second, I was joking that they probably have lead paint in them, but in a sorta-joking sorta way.
Anyways, thats my useless rant about Progen odor.