The Hyatt is decently located in Crystal City and maybe 3/4 mile from the Metro. There is a shuttle that operates throughout the day to take people to and from which is a huge plus. There's also a regular shuttle to/from DCA. You can tell the hotel is older, but there are updates throughout. I had a standard room on the 4th floor which was fine for our family of four. Two double beds didn't leave a lot of room, but we managed. Modern style and a nice view. The room is a bit small, though.
Crystal City is a good base of operations and a place I would recommend for families and people wanting something low stress near DC. Most people understand the Metro system after a few minutes, so no issues there.. you're on the Blue Line and connected to everything. The trip from the airport is maybe two minutes at worst. There are a few places to eat nearby (walking distance: Legal Seafood, Chili's, McDonald's, Clark Street Grill, Subway, Starbucks. There are even more options just beyond the walking threshold. I had pizza from Paisano's delivered one night which was delicious.
I found the noise level to be moderate. Some hotels seem to cater to noisier clientele. There were a few drunkards roaming the halls here and there letting everyone know they were properly inebriated, but it wasn't too terrible. We definitely took the glass elevator with a male stripper on one occasion. Not by choice, mind you.
For the price, this worked great for a long weekend. The shuttle service couldn't have been smoother, and the staff was very accommodating. My only gripe was the inability of any of the soda machines to take bills. Such an odd thing. The desk said the "higher number floors usually do." I tried 15th. Nope. Curious, that.
Anyway, I give it a hearty 4/5 and endorse with little hesitation.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.