For $50 a night, you get a nice queen size bed, a TV with basic cable, a complementary shuttle (that leaves from Econolodge once an hour and comes to get you from the airport at any time), sometimes working Wi-Fi, and a free breakfast (which I did not sample).
There's nothing great about the Econolodge but there's nothing bad about it either except for a musty smell and the feeling that you're in a motel. It's maybe 5 or 10 minutes from the airport and the shuttle drivers are pretty friendly. (Red/yellow Fasttrack bus going to Washington.) You get cheap shampoo/soap/conditioner and you get cheap towels to dry yourself off. You can choose between smoking and non-smoking rooms and you get a keycard. Also, if you get scared at night, there's a safety latch that can prevent the door from opening more than an inch.