I tried doing a search first but couldn't find an appropriate thread, so apologies if this is a repeat of a previous question.

I will be staying in Frankfurt for one night. Which would be the best Marriott property to stay in?

I will be arriving by train from Karlsruhe on Thursday night. I will catch a flight from FRA airport at around 5 pm. On Friday morning I would like to see as much of Frankfurt as possible. This would be my first time in the city.

I would appreciate any advice.