I have the DTT901. I have tried it out, worked fine but not installed right now. Our CBS tower, which will also broadcast the Fox is about 110 miles away, with a medium UHF digital signal from halfway up the tower. Can't get it here. On Feb. 17th, they are switching back to the VHF at the top of the tower, full strength. We get the VHF no problem. It looks like I will be able to get all of the channels from one direction, eventually.
Obviously the brains that picked the date for the "digital conversion" don't live in northern climates. How many people are going to be falling off of their snow covered roofs and towers, trying to adjust their antennas in February?