I spent 32 years in Kingston and just recently sold my last condo there a a few weeks ago. I have been living in BC for 8 years now so my knowledge of the market is limited, but I have heard that it is picking up. Kingston has always had very slow and steady growth. So many public service jobs (9+ prison, 2 large hospitals, 3 large schools and countless other govt jobs) keep it very stable and predictable.
I got out because the hassles were just not worth the returns. The fact that you can't even take a security deposit for your rental is mind blowing to me. Plus the insane property taxes. I pay almost half here in BC vs Ontario for a similar priced home/condo.