Me and my wife decided to stay at the Hyatt Regency Crown Center when visiting Kansas City for a weekend getaway. We booked the hotel via Priceline and got a wonderful price. The room was clean, the room service Pizza was fantastic, the view was wonderful, the only negative that I have about this hotel is that the people working the front desk had a little bit of an attitude. Though the room was nice, I would not rate this a 4 star hotel. The pool area was sub-par and I would have to say the room was just as nice as the 3-star DoubleTree that we stayed in when in Washington DC a few weeks prior.
I would recommend this hotel to anyone visiting the Kansas City area. The location was good (walkway to Crown Center attached to hotel) and the price was very reasonable.
Some activities that I would recommend while in KC is to see a Royals game at Kauffman Stadium, Visit the Argosy Casino, Visit Country Club Plaza, Eat at Jack Stack BBQ.