Modern hotel, with an excellent location just off centre (but on the infinitely preferable side of…read morethe city ring road). The room was probably the nicest I have ever stayed in in Germany..which is right, as it was also the most expensive.
(See photo below)
The sports bar downstairs is rather nice too and a good place to watch German football.
I have to take a star away as until recently there was a fitness centre with weights on the 1st floor. It is gone now but was still mentioned on the internet and in the in-room brochure. This led to a wasted half an hour, initially searching on the 1st floor, being sent up to the 17th floor to the wellness centre (a couple of aerobic machines here), back to my room to check the brochure, before a 2nd uninterrupted sweep of the first floor before a 'dude, where's my dumbells?' yielded an explanation from the friendly receptionist (who clearly wondered why a scruff, such as myself, was staying in a primarily business hotel).
I'd look at alternatives if I went back, but would not go out of my way avoid staying here again.