Decent location, OK property, service is uneven
I couldn't get into the Grand Hyatt (a huge conference was in progress) so the default for this 3-day weekend was the Residence Inn. The location is fine if you walk along the streets leading to the Riverwalk and other tourist areas. In search of bottled watered late the first night, I walked 2 blocks northwest to a gas station on McCullough Ave and it was an entirely different environment. (A customer wanted to shank the attendant because the attendant wouldn't give him a discount on his 12-pack of Dos Equis!) There are other hotels within the same block (its sister, the Fairfield Inn, is directly across the street) or within the next block so the Residence Inn isn't isolated. And there's enough foot traffic at night along the streets leading to and from the Residence Inn so safety isn't a concern as long your route is aligned with the Riverwalk.
The rooms are standard Residence Inn. Be advised, however, they do not have any king rooms - they're all queen beds; even the 2-room suites. I had a queen 1-bedroom suite and the bed itself seemed small to me; more like a full-size mattress. The bedroom is tight, but that's OK if you're not planning to spend a lot time in the room. The living space is acceptable (though, why they place a huge microwave on the counter that takes up 2/3 of the space is a mystery to me.) It appears that the hotel has gone through an update in the last year or two so I found the space clean; wasn't crazy about the choice of colors (Marriott's have the WORST color schemes); the linens threadbare (including the bed coverings and towels); and all the electrical outlets worked.
While housekeeping did provide extra towels upon request, they failed to run the dishwasher. In fact, the entire 3 nights I stayed there, they never ran the dishwasher. I called the front desk and they said the housekeeper should have the run dishwasher, but they would send up some clean cups. (Which they did after the second attempt. Security initially delivered drinking glasses when I requested cups.) 
The parking garage is small. The good news (if it is good news) is that the price of parking is the same whether you self-park or use their valet service. If you return late, you'll most likely have to use the valet service since the parking garage will have run out of space.
Sigh. I tried breakfast, but I really can't eat liquid eggs and I'll take a pass on breakfast buffets that are rich in carbohydrates and trans-fat saturated food. How people gobble down that type of food fascinates me. To their credit, the hotel did have plenty of fresh fruit.
NOTE TO THOSE WHO CARE: Dasani (a Coke product) and Aquafina (a Pepsi product) are NOT spring waters. They are locally filtered TAP water. Marriott seem to be in love with Dasani; probably because it's cheap and it's local TAP water; not spring or mineral water.