Pretty good but with some annoyances
So firstly i think the Dana is pretty good value for money, esp for the central location. The rooms are very comfortable and clean with a good bathroom and a decent stereo (B&W Zeppelin). The bad points - the blinds didnt black out the sun on a morning so we were woken up pretty early most days. Someone has already commented on the unfinished concrete look - made me feel a bit like we were sleeping in the multi-storey carpark. Finally and the biggest issue we had with the Dana is that they seem to value the vertigo bar and their clients MORE than they value their hotel guests. We were made on SEVERAL occassions to walk up one floor to get in the lifts as the ground floor were 'exclusively' for use by the bar guests - surely as a hotel guest we should take prioriity and not be told by rude bouncers and bar staff to go up to the lobby??? The door staff (of the bar) also let the door go in our faces a couple of times instead of being polite and courteous. Quite rude and def shows the attitude of the hotel. 
We were also told a couple of times that the bar was closed for meetings (this was at 6/7pm) so that was quite annoying. 
The gym was small and had these 'cable' machines that were def more form over function - over designed and didnt do the job that a standard multi-gym would've done - a definite let down there.
Check in was also slow - but i think this was a one-off as one guy was having problems with his booking.
Would i stay here again? Probably not as there is such a choice of nice hotels in chicago. But then i wouldnt say there is enough wrong with this hotel say def dont stay here.