When visiting Darmstadt, Hotel Hornung is a great choice to consider. You can unwind with a drink at the bar/lounge, and the coffee shop/café is the perfect spot to grab a bite to eat. Rooms offer minibars, room service, and free WiFi.
Crummy room with little servicePros: Location to central stationCons: Broken chair, empty shampoo bottle, tiny towels, had to request room service. At desk they said no rooms but went online and reserved one minutes later. No explainarion.