I stay at the IHotel for business often (bi-weekly) and have had dinner at Houlihan's on many occasions. This restaurant is very consistent. I haven't had a bad meal yet. The filet mignon with mashed potatoes hits the spot on a cold night in U-C. I'm pretty addicted to their Fat Spaghetti and Potstickers. Weird combo? Yes, but I crave them as soon as I check into the hotel.
The waitstaff is excellent, but a couple of the hostesses could be a tad "warmer". Overall, this is great spot.