It's all about those verbatim's on page 27.
I have a whistler I bought from CC on the black friday sale, and it works pretty damn well. Only thing is it gets set off by lots of unnecessary things like towers, stores, etc. Even under the "city" mode. If you drive on the highway/interstate a lot, it is well worth it to keep johnny law at bay.
Also, if you have never played HITMAN, I suggest you pick it up for $20. It is a really great game IMO, better than max payne :Q ! (it is the same style as max payne.) If you like 3rd person action games, you must get it.