Hi. I'm making my first visit to Germany in two weeks. I have several questions. I've been searching all over Flyertalk for a few hours now, but figured I'm just going to ask.

1) I'm staying at a 25 Hours hotel. Any thoughts on the quality of this hotel?
2) Looks like train is the easiest way to get into the center of town? What does a taxi cost?
3) I get in early in the day - 7:30am. Any suggestions to help me beat jet lag for the day? Looking for things to do until I can get into my hotel room.
4) I have 2 days of free time before work. What should be on my must-see sightseeing tour?
5) Is there a fast-pass lane for American Airlines customers in business class going into FRA, so I can clear customs?

Thanks in advance!