I would think you could get at least CHCH channel 11-that is a very strong signal. I just checked my OTA (which is currently aimed the wrong way and missing a few parts) and I am getting the following:
Channel 4 Buffalo watchable (I watch the news every night on it).
Channel 5 Canada (CBC I think) barely watchable.
Channel 7 Buffalo a little better than 4 watchable.
Channel 11 CHCH very watchable-if anntenna were turned it would be very good.
Channel 17 WNED PBS watchable.
Channel 23 WNLO barely watchable.
Channel 49 Buffalo watchable.
I also get all the Erie stations. Also to be clear, I am speaking of analog only-I have no experience with digital. Remember, your experience could be different with the Buffalo & Canadian stations depending on your location. Also, you would need a good setup for best results-big anntenna, rotor, amp etc.-about $300.
Good luck!