I've used the Streetwise maps for New York (Manhattan and Queens), Chicago, London and Dublin and I've found them extremely useful. One measure of how good they are is how unobtrusively they work their way into your trip. The maps are compact (fit in an inside jacket pocket - good for hiding your tourist status!), contain all the right information (great overlay of subway and street information - in the New York case, probably better than their transit map) and extremely durable laminate (minimal wearing at the folds). Great map.