My girlfriend and I watched every Sharknado in a single night. It was super painful, but honestly I loved it. I think it's amazing that they kept the series running for so long, with so many "*sighhhh* OH MY GOD" moments along the way (Neil deGrasse Tyson anyone?! :) ). This film was the perfect way to finish off the series without bleeding the concept dry.
Although the story, effects, acting, and consistency all suck, the amount of dedication that the cast and crew have given to the series is inspiring. 10/10, would totally watch again.