I got my hands on the Zenith coupon eligible converter box. So far it has been very impressive. I have one TV in my kitchen with the rod type rabbit ears that they used to ship with the TV. They are on a plastic post that slips into a hole on the back of the set.
Last night I took the Zenith stb home and attached it to the kitchen TV. I didn't touch the alignment of the antenna and used the RF out of the stb on ch 3 into the TV.
I live about 6 miles from WFMJ, WYTV, WKBN and about 15 miles from WNEO. I am able to get slightly ghosty pictures from the Youngstown stations and a very snowy picture from WNEO in Salem. I have to adjust the antenna for each station otherwise the picture fades, ghosts, and the audio gets noisey when I move around the kitchen.
After the Zenith did it's auto scan I was able to get all the above stations perfectly with no breakups without moving the antenna. The Zenith has a signal meter that showed almost full scale in the "GOOD" zone on all channels. I adjusted the rabbit ears to optimize the digital signal level and got pretty much unwatchable pictures on analog.
In other words the Zenith box impressed me. It has RF out and video/stereo audio outputs. The EPG is simple and shows "now" and "next". It has all the closed captioning. It does NOT have an analog tuner and does NOT have a QAM tuner. It's also pretty small - about 9" wide and 6" deep. It does come with a remote which I think can be programmed to your TV set, but I haven't done that, mainly because I didn't read the manual.