I love this thing! Now I kind of wish I'd gotten one of the more expensive ones... I can't pick up any police, but I did get some air traffic to come in on my way home. The problem is that I think the cops, fire department, etc. are on trunked systems... what that means is their radios transmit to one another on multiple frequencies that change every few seconds. They send out a code that lets the other radios know what frequency they are going to next... my scanner doesn't have trunking, so I get snippets of conversation and that's it... at least I think that's what's going on. I can't really tell because I don't know what I'm doing.
I did get a bunch of HAM stations to come in though, and that's pretty sweet. Makes me want to get a HAM radio.
Still, this should work fine for scanning frequencies at the track. I can't wait to use it!