The hotel is clean and comfortable, and within easy access to the city centre and the Darmstadtium (where I was attending an event).
A simple breakfast is offered in the price, which was a bonus, but you can pay for a bigger selection including hot food in the sister hotel next door, if you wish.
I arrived on a Sunday which turned out to be a bad time to try and find some food locally as ALL the restaurants are closed the entire day (including the restaurant in the neighbouring hotel)
My room had a water bed, which wasn't all that comfortable for me - but that is a personal thing.