This is with out a doubt the finest hotel in Chicago. Everything about it 5 star plus. My room was large, the windows opened so you can let in fresh air and hear the city sounds. The location is right on Michigan Avenue in the middle of the Magnificent Mile. There is a great reception area, a large lobby restaurant and bar, a café with outdoor seating and everything else you could want. The indoor lap pool is huge, has a view from the 19th floor and has an adjacent outdoor seating/sunning area also with a spectacular view. The hotel lacked nothing. Everything it has is spectacular. And it was all priced accordingly, e.g. my room service breakfast of blueberry pancakes and coffee for one was $55. On the bright side the in room wifi is free and worked great. I cannot think of anything that was less than perfect. Needless to say I would highly recommend this hotel to others who want and can afford this luxury.
One more note on the area-right across the street is the Rosebud Cafe with some of the best Italian food ever with large portions, reasonable prices and great outdoor seating. A must go to in Chicago.

I booked a Fri and Sat Night stay at the Peninsula for my wife and my 1st wedding Anniversary. To simply put it, the Peninsula exceeded our expectations of luxury, service, and relaxation. Check-in was fine, it is a nice touch for the front desk attendant to peronally escort you to your room, give you a brief tour, and inquire of any other needs. The Deluxe king we booked was very clean, spacious, and comfortable. The kingsize bed was very comfortable with plenty of pillows and soft comforter.
The bathroom was very large, marble everything, the highlight is the tv/radio controls for use while in the bathtub. The deep soaking tub and seperate shower have excellent water pressure and space for two.
On Saturday night we went to the lobby for the Jazz at the Pen. The jazz quartet was very good, able to read and play off of the crowd.
The spa and finess center were top notch. The pool is very nice and sun filled, there is an outdoor sundeck, but it can get quite windy 20 floors up.
Room service, housekeeping, and the front desk staff are very efficient and accomodating.
Our weekend at the Peninsula Hotel was arguably the best we have ever had, aside from our honeymoon.

Great 5 nights at The Peninsular where the service was supreme, the room great, the location perfect and the food delightful.
Ate the mad 15 course tasting menu at Avenues - little bit too much food for our delicate UK stomachs though the locals seemed to fare better!
Great room service food and excellent staff. Concierges were superb and really did know where to go and what was what in terms of tours, restaurants and places to visit...
Spa worked a treat - great views and great massage - nothing too much trouble.

You come into the hotel and come up one floor to the main lobby to register. The rooms are large and very well decorated with mood lights even in the bath room. The shower was one of the best I've had and the hot water comes on right away, with excellent pressure.
The health club is well situated in the top floor with and indoor pool. The bed was outstanding, with very comfortable down comforters.
Meals are a little on the high side, but very well presented, but with small portions. Meals are served in a beautiful lobby and a delightful place to hold a business lunch. Service in the whole hotel was excellent and lived up to the reputation of the Peninsular. It is well located opposite Saks 5th Ave, and half a block from the main shopping street.