I have been here couple times and it is bang opposite to the arch. If you use economy parking which is at the mansion house around the block, you only pay $8/day as against $ 26 valet parking. We booked via priceline and hence it wasn't a bad deal. However the housekeeping was terrible. They cleaned zilch.
Breakfast buffet is $15 and change... you might be better of to to go to Hardees which is a block away.

Nice hotel very convenient to downtown. Quick and easy check in. The only complaint is housekeeping did not clean the room during our two night stay. Not a big deal. Starbucks in the lobby as well as a great bar and grille. We even had a view of the arch from our room. Would stay here again.

My wife and I stayed at this hotel for one night as tourists. The location is awesome: its in the downtown centre 2 minutes on foot from the Arch and 5-7 minutes from the Amtrak station by cab. We were easily checked in 30 minutes before the official check-in time. It turned out that the Internet actually is free. The room was spacious and clean.The most incredible thing is the value for money: if you can find 4-stars hotel for only 100 USD with taxes for two person with breakfast and complimentary Internet in the heart of the city, please let me know. No doubts I'll stay there. Despite it was some kind of a school league american football game the weekend we stayed and the hotel was overcrowded with small participants, fans, supporters and their parents the staff was very pleasant and rather quick with their regular duties. We were staying in a queue for breakfast, but it was moving so rapid, so I take it as a well done professional work of waiters and hostesses. I wish I could put an excellent mark, but we were expecting to have bathrobes in our room and there were none. Moreover the call to room service department gave us nothing, no one even picked up the phone and we weren't called back. In any case I consider this visit as an excellent experience. I can definitely recommend this hotel as a place to stay in Saint Louis.

I stay at the Hyatt Regency at the Arch several times per year for work. The hotel is located in a great area - walking distance to see a Cardinals or Rams game. It's quite literally across the street from the Arch and the old courthouse. The views of the Arch and river cannot be missed. You're also near a lot o restaurants and the Lumiere Casino has a shuttle that will pick you up and drop you off (should you want to gamble a bit). As a business traveler, some of the rooms have a small desk which is not ideal to work in, however for those traveling on holiday, that should not be an issue. Also, the hotel staff is very friendly and there's a Starbucks in the hotel. Definitely consider this hotel for your next trip.