I used MSE for a little while, but after I caught a couple of Viruses (fortunately I had images to recover), I went back to NIS - and I never visit any shady websites. Never had that type of problem with Norton. My wife uses it on her systems without any problem. But she is 'less adventures'.
If you plan to stop the Norton subscription, make sure you let them know. Else they will automatically book you for another 3 years.