My family and I visited Washington D.C. for the Memorial Day holiday. At the last minute I was able to book a room for $99 per night which was a fantastic value.
The hotel is very stunning when you walk in-the lobby is very large with soothing music playing and a glass atrium. The rooms are recently renovated and have a 42" flat screen tv which we loved.
The pluses-hotel is built above the metro so you basically just walk downstairs! Very convenient especially with a stroller. About 2 blocks away is the White House and a few blocks more the National Mall. The Lincoln Memorial was about an hour walk but it was nice out so we didn't mind. There were some seedy areas a couple of blocks from the hotel opposite the white house so just be careful.
The minuses-no vent in the bathroom for shower, pool is small and you must reserve a space and time to use it. Also, if you want to watch a children's channel you must pay for it. There was no cartoon type channel for my kids to watch and we didn't pay the 9.99 (it was that or a little bit more) for it. You can play WII in the sports bar downstairs but it costs something like $10 per 15ms which we declined. Don't get breakfast at Zepher's in the lobby. It's awful food and expensive. You'd be better off at Mcdonalds.

Tips-we booked a room with 1/2 price breakfast buffet which we enjoyed. The breakfast area is near the lobby but there is water running through the area and a grand piano. Very pretty. Also, most museums are free of charge so take advantage. Great italian food at Ela's which is a couple of blocks away plus concierge gave us a 10% coupon

Right on top of the metro center subway stop, this is a very convenient and nice hotel. Rooms are nice, and they also have a nice health club facility, although you have to pay extra for it.

The hotel is well located, few minutes walk to the White House, the Capitol and the Mall. Near the hotel is also a metro station (Metro Center - combined with the hotel, an underground tunnel). The rooms are ok, clean with standard equipment but small. Bathroom with bath and shower. In the hotel lobby there is a Starbucks where you can enjoy a quick snack and a cup of coffee. For rooms on 12 floors (Club floor) there is a possibility of the club where breakfast is served in the afternoon are the hors d'oeuvres. Very nice stay. I would definitely stay there again.

We stayed at the Grand Hyatt for two nights during the heat wave... We got a GREAT rate as they apparently run specials on Friday and Saturday night? We pulled up and the valet parking was full. However, there is a public lot RIGHT across the street where it was $20/day. So, we parked there and saved some money. The only downside was making a couple of trips to the car when we checked out, but it wasn't too bad.

This hotel is very close to the sights around the mall, and is attached to the Metro via an underground tunnel. As far as food? I would recommend the food court at National Place which is a short walk away and also the Capital City Brewing Company which was right across the street. Both were reasonably priced and good for families with small kids. I had heard good things about Clydes, Cosi and Potbelly, but we never got there, but thought I'd mention them since they got great reviews.

The room itself was nice, but a little small. But we came to DC to see the sights, so that wasn't a huge problem. We had coupons for half off our buffet breakfast since we booked through AAA, and it was really good. I should also mention that they showed Toy Story in the Atrium the Saturday night of our stay. They served free popcorn and lemonade, although you could purchase other food items if you liked. My kids loved it. Since it was SOO hot outside, seeing the movie "by the pond" was a treat.

I also was impressed with the hotel gift shop. I was looking for a specific Christmas ornament and the clerk/manager was extremely helpful in checking to see if he had more in stock.

There were two negatives, but neither was a huge problem. The first was the pool. You had to make reservations which is completely understandable based on the size of the pool and the size of the hotel. However, it seemed to have TONS of chlorine poured in. My kids only wanted to stay about 15 minutes due to the heavy chemicals.

The second was that there were NO TV channels geared towards kids. Yes, we weren't planning on watching TV all that much, but it would have been helpful to keep the kids occupied when we were trying to get ready in the morning or getting ready to go to sleep.

But both were really minor and certainly not a dealbreaker. Overall, we were VERY pleased with this hotel and we loved the proximity to the Metro. I would definitely recommend this hotel!