I too am doing OTA DTV in the NYC burbs. After 2 months my feelings are mixed but much of my problems are related to antenna location (attic) than DTV itself.
Prior poster is correct that UHF signals (what DTV goes on) are far more directional and subject to reflection than VHF. In addition DTV is an all or nothing situation, just like anything else in the digital world. Failure is absolute, graceful (snow) is not possible.
The picture quality of DTV is better than analog and HD signals are better than those on cable, sat or fiber (I've directly compared sat. to ota) as nobody is doing extra compression.
As to available stations, I in fact have *more* available as there are multiple programs on each signal, ie 4-1,4-3,4-4, 21-2,21-3,21-4 etc. The PBS/non-big 4 stations seem to make better use of the extra programming opportunity.
I'll be upgrading my antenna to one that can go outside and not raise the ire of my HOA. This should clear up most of my reception issues. While I do miss ESPN and FUEL, neither is worth paying $70+ a month for sat/cable/fios. Free is for me and I'm reading more to boot.