Getting this back on topic:
Well, I can throw in my $.02 about the train/subway system in Germany after having ridden it in Munich and Frankfurt, as well as taking the ICE (InterCity Express) between Munich and Frankfurt.
The S-Train (Surface) and U-Train (Underground) system works pretty well. The whole system seems to work on the honor system for riding it. There aren't any turnstiles or anything like I've seen in Taipei, Las Vegas, etc keeping only paying customers on the train. The trains were clean though not necessarily new, very on time, and not air conditioned. The ticket machines are very confusing to someone who doesn't read German though.
The ICE was quite nice. It moves along around 150-170Km/Hr (most of the time) and is comfortable. You have an airline like seat (but with more legroom). The ride very smooth and quiet, although sitting backwards moving along that fast looking out the window on an empty stomach is a little motion sickness inducing.
As a side note the vast majority of buildings in Germany don't have A/C. Even large office buildings lack A/C and have large windows that open (no screens to keep out bugs either, though there don't seem to be many bugs). They also have these large nifty metal blinds on the outside of of windows to block sunlight if you want.