SNL hasn't always been great. The early years were legendarily funny, in the later 90s to the early 2000s was a bit of a low point for SNL, but for the last 10 to 15 years they seem to have found their old glory again.
However, SNL has never been totally bad or not funny at all. I've always watched SNL and always will. It's the one show that I never miss a new episode of. In fact, because I live in the Pacific Time Zone new episodes come on at 8:30pm and then again at 11:30pm, and I watch it both times.
In my opinion it's the funniest thing on the TV.