I can't say enough nice things about the 25h The Trip hotel in Frankfurt. I'd just come from a week in a slightly run-down hotel in Cologne amid hot and humid weather. Arriving at the 25h after that and the adventure of plowing through the crowds at the train station was like stepping into another universe: a calming air-conditioned oasis with cool art and friendly people.
I was so happy with the room that I didn't budge that first evening, opting for snacks and the cozy bed in favor of exploring the city. The next morning, I enjoyed a light breakfast in the hotel and then prepared to hit the streets for a few hours before heading to the airport - now, those streets are a little bit sketchy, even for this city-living city lover. But that's only for a few blocks. In retrospect I'd be a bit cautious about this neighborhood in the dark though. Wouldn't you know it, it was starting to rain as I got ready to go - but of course, they had umbrellas at the desk. I felt well taken care of. "Well taken care of" really sums up my whole experience at the 25h. I wasn't there for long, but will unquestionably look forward to staying here the next time I'm in Frankfurt.