My experience with Classik Hotel was very disappointing.
I made my booking a few hours before I was meant to arrive in to Berlin. I within a couple of hours all trips from London were canceled due to an extreme heatwave. I then tried to cancel my reservation but the hotel was completely unresponsive and then eventually told me that they will be charging 100% of my reservation.
I understand the reality of needing to charge a partial fee in these situations. However, this hotel lacked any sort of flexibility for the situation. I ended up paying them $200 for a reservation that was active for a few hours.
Highly disappointed with my experiences with this chain of hotels. Guaranteed to never bring my business here again. I do not recommend.