Good, but could be better
This past summer we stayed at this Chicago hotel for a week and it was an good but improvable choice. The Doubletree is a mid-range brand which is part of the Hilton chain and is generally designed for business travelers (I'd put it in the 3-to-4-star range). For the price and service, this particular hotel is closer to four stars but a lot of the services are extras. The location is great, just two blocks from the Magnificent Mile and a ten minutes' walk from Navy Pier. On this front, no complaints.
The facilities are correct and appropriate to the hotel's category. The rooms are well-equipped and properly sized. The outdoor pool is in good shape and has nice views of the surrounding skyscrapers. The lobby is spacious and nicely decorated, with a lively but somewhat expensive bar.
The downside of this hotel are all the additional fees. The paid parking lot is pretty steep considering the area ($17/hour), breakfast isn't included in the price of the room, and internet isn't free in the rooms. Luckily, I discovered that if you start your connection in the lobby and go up to the room, I would stay connected. But really...for the prices they charge, guests shouldn't have to do these kinds of things. Also, there was a sensor in the mini-bar so it immediately charges your account the second you remove something from the fridge, whether you end up drinking it or not.
Aside from these little details, it was a good hotel but I probably wouldn't repeat. For the same price, there are a lot of equally-good hotels in the Chicago area that include all these little extras in the price of the room.