Well the thing is that I don't care about every single PIU location. I only care about the good locations. To me, a good location has crowds, some regular good to OMG players, and a quality pad and cabinet. Only one machine near me can be considered good. The other two (that I know of) are crap for the most part, except that one of them gets crowds of 10-20 people on a regular basis. I suppose temperature should also play a role in a good location. Not too hot and not too cold.
These are the kinds of locations I want to learn about.
