Most Hyatts are better than this....
Hyatt is lucky that the Hyatt Regency has a great location on the Riverwalk since there are not many things to like about it otherwise. I will try to be as constructive as possible given that this is an expensive hotel that should be much better. The valet and parking entrance are crowded and confusing off a one way street. The entrance to the hotel is very nice and the checkin process is very acceptable.
The rooms are very, very ordinary and feel tired. The coffee machine is a small, single cup with only the makings for two cups and, in many cases, the normal bathroom amenities are partially missing. The Ironing Board is thin and fragile and the Iron is large and heavy (bad mix!).
The restaurant has a rolling buffet, but you must be warned that they push it as though it's a great value, but the dinner buffet includes lesser cuts of meat and very mundane side dishes. the salad fixings are better and the desserts are mostly wonderful however. The breakfast buffet is not much better and you must check you bill if you are entitled to a free breakfast buffet (an elite bonus) since they often charge regardless.
This is a very high volume hotel so keep your sense of humor and get outdoors whenever you can to enjoy the scenery of the downtown area. Hyatt should make this a better experience so that it does not continue to detract from their typically high quality locations....safe travels...