Horrible
I recently stayed at this hotel for a two week business trip. It was horrible. Me and at least 10 of my colleagues were not able to get their rooms cleaned, some not even getting service for several days on end, even after contacting the front desk and requesting service. Then some people would get service when the "privacy" sign was on the door. Plus the rooms were never really cleaned. They failed to take out my trash on a few occasions, there was a layer of dust and dirt in between my bathroom vanity and the window (corner King room), pretty sure my sheets never got changed, my floor was never vacuumed the whole two weeks, and on my first day there I stepped on something sharp on the floor so I'm not sure when it was vacuumed last. This is totally unacceptable. And to make matters worse, me and several other colleagues had items stolen from our rooms, from food items and cosmetics to non-prescription drugs One colleague's tablet computer was even used while they were out of the room (at which point the "privacy" sign had been placed on the door, someone still entered the room). I've never stayed anywhere in which the guests were so blatantly disrespected and ignored. We were told the issues were "under investigation" and given a $25 credit to our room. (oh yay *sarcasm*) 
On several nights, there was a strong odor coming from behind the bar on the second floor, which smelled like sewage. The staff there seemed to be aware of this problem, but could not do anything to resolve the issue. I would think the local health department should have concern over this issue, since food and drinks are served there; and I hope, for the health of your guests and staff, this be looked into. 
I will never stay here again or recommend the hotel to anyone. I doubt my company will either. This is unfortunate since the location and size of the hotel, and its proximity to so many great businesses, would otherwise make this the best option for Columbus. I was surprised that such a large hotel chain failed in so many ways to provide adequate service.