I have had the Aereo service for about six months in Manhattan. It is not perfect, but it serves my OTA stations problem, having cut my cable, in a city in which an antenna simply does not work. There are two ways to access it in my situation. You can use the private channel on Roku or you can access the aereo app on a computer or iOS device and Airplay it to your tv.
There can be some buffering at times, but it is generally reliable. For about $8 per month, they offer you 20 hours of DVR service in the cloud which is comparable to a Tivo. You can fast forward, fast back, erase or keep programs as you watch them or delete them. They have a good on-screen guide from which you can schedule shows to record, either one at a time or automatically for each new episode.
As I say, video playback is pretty good, although stereo only, no surround sound. There are occassional artifacts, but I suspect the culprit is dips in the wireless signal., affecting buffering. At its best, it is pretty good, priced reasonably and solves the problem nicely. An occasional glitch, but unless you are a perfectionist, it solves the antenna problem in troublesome areas quite nicely.