I was one of the suckers lining up for an hour and a half to try their cheesecake (I was totally fooled by the long lineup waiting outside). I thought to myself, so many people can't be wrong....! Well... after finally getting a hold on one and trying the cake, I was not mind-blown.
Whereas the cheesecake is indeed fluffier and less sweet than the varieties found at other Japanese stores or T&T Supermarket, it is not worth the 1.5 hour wait. I would swing by to buy another cheesecake if I happen to walk by one day and discover there is no lineup outside, but would not line up for hours again.
As an interesting note, not long after trying the cheesecake from their Bay street location, I traveled to Malaysia where I happened to find another Uncle Tetsu shop inside a mall. No lineups whatsoever, I bought another cheesecake within 3 minutes and tasted exactly the same as the one from Toronto. So at least the quality is consistent, but not worth hours lined-up.