Our family of 4 stayed here for 2 nights in August. It's an very attractive space in both public spaces and rooms, and has a friendly and helpful staff. This review is specifically for the "King Suite" room. Currently you can't tell from the pictures on their website, but the "king suite" rooms are true suites--totally separate bedroom with a king size bed. The large pullout sectional couch in the other room folds out to a full size bed, I believe, and the mattress is reasonably comfortable. Best part: we were able to make up the "L" shaped leg of the sofa into a small separate bed for our preschooler. Perfect.
Rooms: the living room has a dining table for 4, desk, granite bar/sink/microwave, large flat screen TV, and big sunny windows. The bathroom area is small but totally serviceable, with a few extra shelves for your own toiletries. And the bedroom had huge sunny windows on 2 sides (with blackout drapes), dresser, 2 full-sized mirrored closets, and tons of outlets for charging electronic devices. The bed is comfy with good linens.
Food: The breakfast buffet is fully as good as all the other reviews say. Very good selection, plenty of healthy options including oatmeal, fresh fruit, hard boiled eggs. The breakfast sandwiches are tasty. We put together a tray and brought it up to the dining table in our suite. Very nice way to start the day.
Location: Downtown Des Moines is very easy to navigate. We had a car, but the Hyatt Place has a shuttle that will take you around the nearby vicinity. It's just a few blocks walk to Court Avenue, which has plenty of restaurants and brew pubs, and a fantastic farmer's market on Saturday mornings (produce, food vendors, flowers, street performers). There's a "Pantry" convenience mart just across the street in the 2nd level skywalk. Handy during the day for little necessities.
Word of warning--there's no room service. We arrived late after a long trip (too late to take the kids out to eat) and the dining options were limited. Turns out, almost no restaurants deliver to this area, so we ordered from the very limited in-house menu and went back down to the lobby to pick it up. It took 3 trips downstairs to get everything correct; the food was fine (monte cristo sandwich--fine, club sandwich--very good, cheese pizza--not good) but to the staff's credit they did very kindly accommodate our son's food allergies and make a plain turkey sandwich that wasn't on the official menu. I'd say it's good to have in a pinch, but if you have time and a vehicle, do plan to eat elsewhere.
Overall, the space and the breakfast choices make this an excellent choice for a family. Highly recommended.