Heaven? You must have a different definition of that word than I do. I lived there for four years, and rarely envied bikers. Particularly not when I saw them racing down Mass. Ave between a block of cars trying not to get squeezed off the road. Maybe things are different farther uptown, or away from the main streets. What I do remember was lots of traffic, non-existent bike lanes, and what appeared to be generally stressful conditions for people who dared to cycle anywhere beyond campus, trails, or paths.