We stayed here for one night and the place is difficult to find. There are no Hyatt signs and it took us longer to find this place. Once we did get here it was a very bizarre setup due to the renovations they were doing. It looks ok but did not seem on par with a 4 star. It appears to be corporate housing turned into a hyatt. The staff were very nice at this hotel. They provided us with a room near the pool. When we got to the pool it had somewhat of a questionable crowd there with several kids in the whirlpool. This is a bit disappointing to run into this at a 4 star hotel. You would expect this at a 2 star. Also the whirlpool was only luke warm. Again, not on par with a 4 star. The swimming pool is very big which was nice and appeared to be clean. It was a huge lap pool. Luckily, the rif raf that was in there we could stay far away from them in the pool. The rooms are nice and big and clean and once in there they did seem to block out alot of noise. Unless you valet park there is a pretty big walk to the parking lot and back to the hotel. I didn't mind but there are several stairs to the entrance. Overall the hotel was just OK.

This is a very unique Hyatt property. If you enjoy that in your hotel stays, you will love this property. Otherwise, IMO - look elsewhere. (same if you have some reason to hate McDonalds)
Hotel is about 70% through a huge remodel, scheduled to be done Mar 1 or so. I was upgraded to a (remodeled) parlor suite. Parlor area had sofa, chair, dining/meeting table (round w/4 chairs), full bath. Not a ripped out entire room remodel, but bath was beautifully done, colors are great for the property, and interesting use of design components. I thought it quite nice - think "elegant lodge". Bedroom had King bed, another full bath, desk, etc etc. Both rooms had floor to ceiling windows/patio doors that overlooked the woods, as well as a small frig.
Room service appears to be standard 'burb Hyatt menu...but restaurant is different. Think ordering at McDonalds, but receiving Hyatt food in a pretty setting overlooking a small lake. Odd at first, but as all you do is order at the counter, and then receive table service, not a big deal to me. I loved the setting, and breakfast was cooked perfectly and served pleasantly- only odd thing was that you received coffee in a "to go" cup. Funny though - in this part of the hotel you are on McDonalds wi-fi!
For room service dinner had several special requests. Accommodated and served correctly.
Spa- mixed report. Locker rooms are still under construction, so no steam sauna. Staff providing services were friendly, but of varying experience. Area is not particularly spa like...resembles a salon, not particularly restful. Definite opportunity for improvement. Gym is larger than usual and well equipped, but also has outside members. Not a problem when I was there.
It is winter, valet parking was $12 - so I valeted. In the summer, I think walking to the parking lot would be pleasant..it isn't that far. YMMV.
Although it is an office park setting, it reminds me more of a college campus. Wooded, walking paths and trails. As others have said, very Frank Lloyd Wright. Lobby/bar area overlooks lake, has a fireplace - relaxing. Gorgeous stone patio to sit outside in summer.
LOTS of upscale shopping and restaurants in the area. Hotel can be hard to find - there is NO Hyatt sign on the road...look for signs that say McDonalds Corporation. Even once in the park signs will say LODGE and not Hyatt. Once you are here it is EZ to get around, and there is nothing you could possibly want that isn't within a mile or so.
I had a good experience here, and will definitely return. Biggest downside - no rooms that overlook the lake.

We were there to share family time and wanted a location that gave us that something special and a staff concerned enough to ensure it. We had two connecting rooms which delighted my grandsons , that had been recently renovated and were spacious and lovely. Walk in shower, comfortable beds and a large TV. Very clean and fresh. The pool area is large and inviting. Surrounded by glass the pool itself is quite large and the water warm..there were three generations of us swimming together..from 7 months to 70 yrs! And, clean! We had breakfast at their small restaurant..an upscale McDonalds and there was something for everyone.
And a special Thank-You to front desk staff Daniel and Lori. More than helpful and professional, they helped make this a very special experience.

A wonderful little hotel tucked away in Oak Brook. Nice lounge, restaurants and walking trails. Staff were super friendly and rooms were very adequate.